Irregular in shape, Hydrus is bordered by Mensa to the southeast, Eridanus to the east, Horologium and Reticulum to the northeast, Phoenix to the north, Tucana to the northwest and west, and Octans to the south; Lacaille had shortened Hydrus' tail to make space for this last constellation he had drawn up. Covering 243 square degrees and 0.589% of the night sky, it ranks 61st of the 88 constellations in size. The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Hyi". The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon of 12 segments.
Characteristics
Hydrus
Hydrus | Characteristics
Irregular in shape and its tail has been shortened to make space for this last constellation he had drawn up. Covering 243 square degrees and 0.589% of the night sky, it ranks 61st of the 88 constellations in size. Irregular in shape, it covers 243 square degrees and 0.589% of the night sky; it ranks 61st of the 88 constellations in size ; Hydrus culminates at midnight around 26 October. Covering 243 square degrees and 0.589% of the night sky, it ranks 61st of the 88 constellations in size
what is hydrus?
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Small constellation in the deep southern sky.
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what are its characteristics?
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Hydrus is a small constellation in the southern sky. Hydrus may also refer to:
Hydrus (disambiguation) | Introduction
Irregular in shape, Hydrus is bordered by Mensa to the southeast, Eridanus to the east, Horologium and Reticulum to the northeast, Phoenix to the north, Tucana to the northwest and west, and Octans to the south; Lacaille had shortened Hydrus' tail to make space for this last constellation he had drawn up. Covering 243 square degrees and 0.589% of the night sky, it ranks 61st of the 88 constellations in size. The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Hyi". The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon of 12 segments.
Hydrus | Characteristics
Hydrus is a small constellation in the deep southern sky. It was one of twelve constellations created by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman and it first appeared on a 35-cm (14 in) diameter celestial globe published in late 1597 (or early 1598) in Amsterdam by Plancius and Jodocus Hondius. The first depiction of this constellation in a celestial atlas was in Johann Bayer's Uranometria of 1603. The French explorer and astronomer Nicolas Louis de Lacaille charted the brighter stars and gave their Bayer designations in 1756. Its name means "male water snake", as opposed to Hydra, a much larger constellation that represents a female water snake.
Hydrus | Introduction
Hydrus culminates at midnight around 26 October.
Hydrus | Characteristics
This is the list of notable stars in the constellation Hydrus, sorted by decreasing brightness.
List of stars in Hydrus | Introduction
In the equatorial coordinate system, the right ascension coordinates of these borders lie between and , while the declination coordinates are between −57.85° and −82.06°. As one of the deep southern constellations, it remains below the horizon at latitudes north of the 30th parallel in the Northern Hemisphere, and is circumpolar at latitudes south of the 50th parallel in the Southern Hemisphere. Indeed, Herman Melville mentions it and Argo Navis in Moby Dick "beneath effulgent Antarctic Skies", highlighting his knowledge of the southern constellations from whaling voyages. A line drawn between the long axis of the Southern Cross to Beta Hydri and then extended 4.5 times will mark a point due south.
Hydrus | Characteristics
Most of the cloud is located in the neighbouring constellation Tucana.
Hydrus | Deep-sky objects
Hydrus was one of the twelve constellations established by the Dutch astronomer Petrus Plancius from the observations of the southern sky by the Dutch explorers Pieter Dirkszoon Keyser and Frederick de Houtman, who had sailed on the first Dutch trading expedition, known as the "Eerste Schipvaart", to the East Indies. It first appeared on a 35-cm (14 in) diameter celestial globe published in 1598 in Amsterdam by Plancius with Jodocus Hondius. The first depiction of this constellation in a celestial atlas was in the German cartographer Johann Bayer's "Uranometria" of 1603. De Houtman included it in his southern star catalogue the same year under the Dutch name "De Waterslang", "The Water Snake", it representing a type of snake encountered on the expedition rather than a mythical creature.
Hydrus | History
The map of Chinese constellation in constellation Hydrus area consists of:
Hydrus in Chinese astronomy | Stars
A line drawn between Alpha Hydri and Beta Centauri is bisected by the south celestial pole.
Hydrus | Stars
The constellation also contains a spiral galaxy, NGC 1511, which lies edge on to observers on Earth and is readily viewed in amateur telescopes. Located mostly in Dorado, the Large Magellanic Cloud extends into Hydrus. The globular cluster NGC 1466 is an outlying component of the galaxy, and contains many RR Lyrae-type variable stars. It has a magnitude of 11.59 and is thought to be over 12 billion years old. Two stars, HD 24188 of magnitude 6.3 and HD 24115 of magnitude 9.0, lie nearby in its foreground. NGC 602 is composed of an emission nebula and a young, bright open cluster of stars that is an outlying component on the eastern edge of the Small Magellanic Cloud, a satellite galaxy to the Milky Way.
Hydrus | Deep-sky objects
The modern constellation Hydrus is not included in the Three Enclosures and Twenty-Eight Mansions system of traditional Chinese uranography because its stars are too far south for observers in China to know about them prior to the introduction of Western star charts. Based on the work of Xu Guangqi and the German Jesuit missionary Johann Adam Schall von Bell in the late Ming Dynasty, this constellation has been classified under the 23 "Southern Asterisms" (近南極星區, "Jìnnánjíxīngōu") with the names "Snake's Tail" (蛇尾, "Shéwěi"), "Snake's Abdomen" (蛇腹, "Shéfù"), "Snake's Head" (蛇首, "Shéshǒu") and "White Patched Nearby" (附白, "Fùbái"). The name of the western constellation in modern Chinese is 水蛇座 ("shuǐ shé zuò"), which means "the water snake constellation".
Hydrus in Chinese astronomy | Introduction
A hydrus has no set appearance. Normally it is considered to be a water snake, although Pliny the Elder believed that it was an otter. Other animals the hydrus has been thought of as include a bird, a dragon, and a mongoose.
Hydrus (legendary creature) | Appearance
The French explorer and astronomer Nicolas Louis de Lacaille called it "l’Hydre Mâle" on the 1756 version of his planisphere of the southern skies, distinguishing it from the feminine Hydra. The French name was retained by Jean Fortin in 1776 for his "Atlas Céleste", while Lacaille Latinised the name to Hydrus for his revised "Coelum Australe Stelliferum" in 1763.
Hydrus | History
Thought to be between 6.4 and 7.1 billion years old, this star bears some resemblance to what the Sun may look like in the far distant future, making it an object of interest to astronomers. It is also the closest bright star to the south celestial pole. Located at the northern edge of the constellation and just southwest of Achernar is Alpha Hydri, a white sub-giant star of magnitude 2.9, situated 72 light-years from Earth. Of spectral type F0IV, it is beginning to cool and enlarge as it uses up its supply of hydrogen. It is twice as massive and 3.3 times as wide as our sun and 26 times more luminous.
Hydrus | Stars
ν Hydri, Latinized as Nu Hydri, is a single star in the southern circumpolar constellation of Hydrus. It is orange-hued and faintly visible to the naked eye with an apparent visual magnitude of 4.76. This object is located approximately 331 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +3 km/s. It is a member of the Ursa Major Moving Group of stars that share a common motion through space. This is an aging giant star with a stellar classification of K3III. With the supply of hydrogen at its core exhausted, the star has expanded and cooled.
Nu Hydri | Introduction
The Hydrus (also known as "Enhydros, Enidros, Hildris, Hydra, Idra, Idres, Ydre, Ydris", and "Ydrus") is a creature from Medieval bestiaries. They were said to be found in the Nile River. While in the Nile, a crocodile would roll the hydrus in the mud before eating the smaller creature. However, once inside the crocodile's stomach, the hydrus would burst free from the stomach lining. In medieval Christian tradition, this bursting free from the crocodile became an emblem of the resurrection of Christ bursting free from Hell. There is considerable confusion in applying the name hydrus and its variations to beasts.
Hydrus (legendary creature) | Introduction
Beta Hydri (β Hyi, β Hydri) is a star in the southern circumpolar constellation of Hydrus. (Note that Hydrus is not the same as Hydra.) With an apparent visual magnitude of 2.8, this is the brightest star in the constellation. Based upon parallax measurements the distance to this star is about . This star has about 104% of the mass of the Sun and 181% of the Sun's radius, with more than three times the Sun's luminosity. The spectrum of this star matches a stellar classification of G2 IV, with the luminosity class of 'IV' indicating this is a subgiant star.
Beta Hydri | Introduction
The root of the word itself refers to water, and this led to several beasts, mostly serpents, being so labeled. Isidore of Seville lists the hydros, a water snake that causes those bitten to swell up, the cure for which is the dung of an ox. The hydrus was also confused with the Hydra of the Hercules legend, some texts saying that it was a many-headed water dragon, living in the swamp of Lerna, that could grow new heads.
Hydrus (legendary creature) | Introduction
Alpha Hydri (α Hyi, α Hydri) is the second brightest star in the southern circumpolar constellation of Hydrus. It is readily visible to the naked eye with an apparent visual magnitude of +2.9. It is sometimes informally known as the Head of Hydrus. This should not be confused with Alpha Hydrae (Alphard) in the constellation Hydra. Alpha Hydri is one of only three stars in the constellation Hydrus that are above the fourth visual magnitude. This star can be readily located as it lies to the south and west of the prominent star Achernar in the constellation Eridanus. Based upon parallax measurements from the Hipparcos mission, Alpha Hydri is located at a distance of about from Earth.
Alpha Hydri | Introduction
Delta Hydri, Latinized from δ Hydri, is a single, white-hued star in the southern constellation of Hydrus. It is bright enough to be faintly visible to the naked eye with an apparent visual magnitude of 4.09. The distance to this star, based upon an annual parallax shift of 23.35 mas, is about 140 light years. It is moving away from the Sun with a radial velocity of +6 km/s. This is an ordinary A-type main-sequence star with a stellar classification of A2 V It is about 209 million years old and has a high rate of spin, showing a projected rotational velocity of 162 km/s.
Delta Hydri | Introduction
Beta Hydri, the brightest star in Hydrus, is a yellow star of apparent magnitude 2.8, lying 24 light-years from Earth. It has about 104% of the mass of the Sun and 181% of the Sun's radius, with more than three times the Sun's luminosity. The spectrum of this star matches a stellar classification of G2 IV, with the luminosity class of 'IV' indicating this is a subgiant star. As such, it is a slightly more evolved star than the Sun, with the supply of hydrogen fuel at its core becoming exhausted. It is the nearest subgiant star to the Sun and one of the oldest stars in the solar neighbourhood.
Hydrus | Stars
Hovahydrus is a genus of beetles in the family Dytiscidae, containing the following species:
Hovahydrus | Introduction
The name of this genus is said to come from this trait as hemi- mean half and -andrus means male, as the species where the female has a short ovipositor can sometimes be mistaken for a male. This genus has a diverse diet, depending on the species.
Hemiandrus | Introduction
Epsilon Hydri, Latinized from ε Hydri, is a single, blue-white hued star in the southern constellation of Hydrus. It is a faint star with an apparent visual magnitude of 4.12, but it can be seen with the naked eye. Measurements made by the Hipparcos spacecraft showed an annual parallax shift of 21.48 mas, which provides a distance estimate of 152 light years. The star is moving away from the Sun with a radial velocity of +13.6 km/s. It is a member of the Tucana-Horologium moving group, an association of stars that share a common motion through space. The stellar classification for this star is B9 Va, indicating that is it a B-type main-sequence star that is generating energy through hydrogen fusion at its core.
Epsilon Hydri | Introduction
It remains below the horizon for most Northern Hemisphere observers. The brightest star is the 2.8-magnitude Beta Hydri, also the closest reasonably bright star to the south celestial pole. Pulsating between magnitude 3.26 and 3.33, Gamma Hydri is a variable red giant 60 times the diameter of our Sun. Lying near it is VW Hydri, one of the brightest dwarf novae in the heavens. Four star systems in Hydrus have been found to have exoplanets to date, including HD 10180, which could bear up to nine planetary companions.
Hydrus | Introduction
The humerus was relatively short. The claws of the hand were high at their bases and suddenly narrowed transversely in the middle. The zygapophyses in the middle of the tail were bow-shaped.
Juravenator | Description
Oechydrus is a Neotropical butterfly genus in the family Hesperiidae (Eudaminae).
Oechydrus | Introduction
Hydrus contains only faint deep-sky objects. IC 1717 was a deep-sky object discovered by the Danish astronomer John Louis Emil Dreyer in the late 19th century. The object at the coordinate Dreyer observed is no longer there, and is now a mystery. It was very likely to have been a faint comet. PGC 6240, known as the White Rose Galaxy, is a giant spiral galaxy surrounded by shells resembling rose petals, located around 345 million light years from the Solar System. Unusually, it has cohorts of globular clusters of three distinct ages suggesting bouts of post-starburst formation following a merger with another galaxy.
Hydrus | Deep-sky objects
Zeta Hydri, Latinized from ζ Hydri, is a single, white-hued star in the southern constellation of Hydrus. It is faintly visible to the naked eye with an apparent magnitude of 4.83. This distance to this star can be estimated from its annual parallax shift of 11.47 mas, showing it to be about 284 light years away. It is moving further away from the Sun with a radial velocity of +3.6 km/s. The spectrum of this star matches a stellar classification of A2 IV, suggesting it is a subgiant star that is in the process of evolving away from the main sequence as the supply of hydrogen at its core becomes exhausted.
Zeta Hydri | Introduction
Species of "Hindeodus" are divided into two groups based on the morphology of the posterior portion of the elements. Species such as "H.parvus" and "H.eurypyge" grow posteriorly and look rectangular from a lateral perspective. Elements grow by the addition of new denticles to the posterior margin. After one denticle fully grows, a bulge begins to form on the lower posterior margin of the element, and gradually grows upward until the denticle fully develops. The cycle repeats with a new bulge. These elements tend to grow evenly thus yielding a rectangular shape. In contrast, other species such as "H.typicalis" of "H.
Hindeodus | Classification
HD 20003 is a star in the southern constellation Hydrus. With an apparent visual magnitude of 8.39, this yellow-hued star is much too faint to be visible to the naked eye. It is located at a distance of 136.6 light years from the Sun based on parallax. HD 20003 is drifting closer with a radial velocity of −16 km/s, and is predicted to come to within in around 1.4 million years from now. This object is an ordinary, G-type main-sequence star with a stellar classification of G8 V. It is around five billion years old with a magnetic activity cycle lasting about ten years and a projected rotational velocity of 2.2 km/s.
HD 20003 | Introduction
Palpi long and sickle shaped. Second joint curved over the head and third joint long. Thorax and abdomen smoothly scaled. Forewings with rounded apex usually. The outer margin evenly curved with short cell. Veins 4 and stalked. Hardly a trace of the discocellulars found. Vein 6 from upper angle of cell and veins 7 to 10 stalked. Hindwings with short cell. Vein 3 and 4 stalked. Vein 5 from lower angle of cell and vein 6 and 7 stalked.
Hydrillodes | Description
In Greek mythology, Hydaspes (Ὑδάσπης), was a Punjabi river god with an extraordinary swift stream that flows into the Saronitic Syrtis. It is the modern day, Jhelum River in modern Pakistan.
Hydaspes (mythology) | Introduction
Forming the profile of a Bull's face is a "V" or "K"-shaped asterism of stars. This outline is created by prominent members of the Hyades, the nearest distinct open star cluster after the Ursa Major Moving Group. In this profile, Aldebaran forms the bull's bloodshot eye, which has been described as "glaring menacingly at the hunter Orion", a constellation that lies just to the southwest. The Hyades span about 5° of the sky, so that they can only be viewed in their entirety with binoculars or the unaided eye. It includes a naked eye double star, Theta Tauri (the proper name of Theta Tauri is "Chakumuy"), with a separation of 5.6 arcminutes.
Taurus (constellation) | Features
Theta Hydri, Latinized from θ Hydri, is the Bayer designation for a blue-white hued star in the southern constellation of Hydrus. It is faintly visible to the naked eye with an apparent visual magnitude of +5.53. Based upon an annual parallax shift of 6.34 mas as seen from Earth, is located roughly 510 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction of 0.10 due to interstellar dust. It is moving away from the Sun with a radial velocity of +12.3 km/s. A stellar classification of B8 III/IV suggests it is an evolving B-type star showing mixed traits of a subgiant or giant star.
Theta Hydri | Introduction
"Hyphydrus ovatus" can reach a length of . The body is rust-red, sometimes with indistinct spots. Males have brilliant colors, and the female matt.
Hyphydrus ovatus | Description
The species of this genus are large (up to a max of 15 cm) and hairy scorpions with yellowish tones through their bodies although there is an exception in "Hadrurus spadix", a species which has a dark almost black prosoma and mesosoma while the palps, legs and metasoma are yellow in color. Not the palps nor the metasoma are in any way reduced in size.
Hadrurus | General characteristics
USS "Hydrus" (AKA-28) was an named after the southern constellation "Hydrus." She served as a commissioned ship for 15 months. "Hydrus" (AKA-28) was launched under Maritime Commission contract by Walsh-Kaiser Co., Inc., Providence, R.I., 28 October 1944; sponsored by Mrs. Alexander Hylek; and commissioned 9 December, Lt. Comdr. R. J. Wissinger in command.
USS Hydrus (AKA-28) | Introduction
γ Hydri, Latinised as Gamma Hydri, is a solitary, red-hued star in the constellation Hydrus. It has an apparent visual magnitude of 3.26, making it easily visible to the naked eye at night. Based upon an annual parallax shift of 15.24 mas as measured from Earth, the system is located about 214 light years from the Sun. This is an evolved red giant star with a stellar classification of M1 III, and is most like on the asymptotic giant branch of the HR diagram. It is a semiregular variable that pulsates between magnitudes 3.26 and 3.33, although its period is not known precisely.
Gamma Hydri | Introduction
Hydaticus is a genus of predatory water beetle belonging to the family Dytiscidae, native to the Palearctic (including Europe), the Afro-tropical region, the Near East, the Nearctic and North Africa. It contains the following species:
Hydaticus | Introduction
Eta Hydri (η Hyi, η Hydri), often catalogued as HD 11977, is a giant yellow star approximately 219 light-years away in the constellation of Hydrus. Based on its mass, it was probably a class A star (similar to Vega or Fomalhaut) when it was on the main sequence, though it is now in the giant stage of its evolution. It is thought to be around 1.3 billion years old and has expanded to 10 times the Sun's diameter, though is only around 1.8 times as massive as the Sun. As of 2005, an extrasolar planet was confirmed to be orbiting the star.
Eta2 Hydri | Introduction
Keyzer and de Houtman assigned fifteen stars to the constellation in their Malay and Madagascan vocabulary, with a star that would be later designated as Alpha Hydri marking the head, Gamma the chest and a number of stars that were later allocated to Tucana, Reticulum, Mensa and Horologium marking the body and tail. Lacaille charted and designated 20 stars with the Bayer designations Alpha through to Tau in 1756. Of these, he used the designations Eta, Pi and Tau twice each, for three sets of two stars close together, and omitted Omicron and Xi. He assigned Rho to a star that subsequent astronomers were unable to find.
Hydrus | Stars
Carabhydrus is a genus of beetles in the family Dytiscidae, containing the following species:
Carabhydrus | Introduction
Hydrus is a suite of Windows-based modeling software that can be used for analysis of water flow, heat and solute transport in variably saturated porous media (e.g., soils). HYDRUS suite of software is supported by an interactive graphics-based interface for data-preprocessing, discretization of the soil profile, and graphic presentation of the results. While HYDRUS-1D simulates water flow, solute and heat transport in one-dimension, and is a public domain software, HYDRUS 2D/3D extends the simulation capabilities to the second and third dimensions, and is distributed commercially.
Hydrus (software) | Introduction
"Pyrrhus" is an assumed C-type asteroid, while most larger Jupiter trojans are D-type asteroids. It has a typical V–I color index of 0.95 "(also see table)".
5283 Pyrrhus | Physical characteristics
Hydriris is a genus of pyraloid moths in the tribe Hydririni of the subfamily Spilomelinae.
Hydriris | Introduction
Table: fatty acid composition of oil Table of physical properties of oil
Hydnocarpus wightianus | Physical characteristics and composition
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, "Horus" measures 12.986 kilometers in diameter and its surface has an albedo of 0.070. The body has a rotation period of 6.183 hours.
1924 Horus | Physical characteristics
Eta Hydri, Latinized from η Hydri, is a blue-white hued star in the southern constellation of Hydrus. It has an apparent visual magnitude of 6.76, which may be too faint to be visible to the naked eye. Based upon an annual parallax shift of as measured from Earth, the system is located about 619 light years distant from the Sun. At that distance, the visual magnitude of the star is diminished by 0.10 magnitudes of extinction due to interstellar dust. The star is drifting further away with a heliocentric radial velocity of +15 km/s. This is a B-type main-sequence star with a stellar classification of B9 V that was suspected in 1939 by Herbert Schneller of being variable.
Eta1 Hydri | Introduction
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, (), meaning "Snake's Head", refers to an asterism consisting of α Hydri and β Reticuli. Consequently, α Hydri itself is known as (, .)
Alpha Hydri | Naming
"Thessandrus" has been characterized as a D-type asteroid by Pan-STARRS' survey. It is also a D-type in the SDSS-based taxonomy.
4902 Thessandrus | Physical characteristics
Hydaspis Chaos is a region in the Oxia Palus quadrangle of Mars, located at 3.2° north latitude and 27.1° west longitude. The region is about 355 km across. It was named after a classical albedo feature.
Hydaspis Chaos | Introduction
"Selenogyrus" has no rastellum (spines for digging) on the front of the chelicerae. This distinguishes it from "Euphrictus". The stridulatory setae on the chelicerae are clavate (scimitar shaped).
Selenogyrus | Characteristic features
Hylotorus is a genus of beetles in the family Carabidae, containing the following species:
Hylotorus | Introduction
At present it has 21 times the girth of the Sun. It is 2.4 billion years old with estimates of its mass ranging from 1.8 to 3.5 times the mass of the Sun. The star is radiating 184 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,612 K.
Nu Hydri | Introduction
As such, it is a slightly more evolved star than the Sun, with the supply of hydrogen at its core becoming exhausted. It is one of the oldest stars in the solar neighborhood. This star bears some resemblance to what the Sun might look like in the far distant future, making it an object of interest to astronomers.
Beta Hydri | Introduction
Hydissus or Hydissos (), Hydisus or Hydisos (Ὑδισός), or Hydissa (Ὕδισσα) was a town of ancient Caria, situated east of Mylassa. Hydissus was a "polis" (city-state) and a member of the Delian League. Its site is located near Karacahisar, Asiatic Turkey.
Hydissus | Introduction
This is giving the star an oblate shape with an equatorial bulge that is 7% larger than the polar radius. The star has 2.25 times the mass of the Sun and 2.3 times the Sun's radius. It is radiating 39.5 times the Sun's luminosity from its photosphere at an effective temperature of around 9.880. Delta Hydri has been checked for an infrared excess, but none was found.
Delta Hydri | Introduction
Pupae of "H. cydno" are characterized by antennae, an abdomen with long spines, and a general dark brown color. They have two rectangular gold patches that decorate the thorax.
Heliconius cydno | Pupae
Hystricosphodrus vailatii is a species of beetle in the family Carabidae, the only species in the genus Hystricosphodrus.
Hystricosphodrus | Introduction
"Hyastenus hilgendorfi" has a roughly pear-shaped carapace which is convex and bearing small tubercles and a downy coat, there is a small epibranchial plug. There are prominent projections on the gastric region, heart and gut. A pair of post-gastric tubercles are close to the orbits. Six mesobranchial tubercles are sub-equal to the sides of the midline. There are two divergent rostral spines, which have a length of two-thirds of the carapace in males but are much smaller in females. The retractable eyestalks are small. The chelipeds are the same length as the carapace, the merus has nodules in its proximal portion while the claw is smooth and glabrous.
Hyastenus hilgendorfi | Description
Palpi slight, upturned and reaching above vertex of head. Antennae minutely ciliated in male. Neuration is similar to "Rhodoneura", differs due to stalked forewings in veins 8 and 9.
Hypolamprus | Description
The earliest form of the hydria was a large, round shouldered, full-bodied vessel. This shape was commonly used for black-figure pottery during the 6 century BC. Its characteristics included a well-delineated shoulder, an articulated neck and an overhanging ring-shaped (torus) lip. The hydria was manufactured with three handles: two horizontal ones at its sides and a vertical one on its back. It ranged from 33cm to 50cm in height and it was glossed on the outside and not on the inside.
Hydria | Hydria
The rock hyrax is squat and heavily built, adults reaching a length of and weighing around , with a slight sexual dimorphism, males being approximately 10% heavier than females. Their fur is thick and grey-brown, although this varies strongly between different environments: from dark brown in wetter habitats, to light gray in desert living individuals. Hyrax size (as measured by skull length and humerus diameter) is correlated to precipitation, probably because of the effect on preferred hyrax forage. Prominent in and apparently unique to hyraxes is the dorsal gland, which excretes an odour used for social communication and territorial marking.
Rock hyrax | Characteristics
Cope remarks the characteristics of "H. rogersii" and his new specimen are very similar, but the articular faces of the centrum are less concave than "H. rogersii". The species was named "Hyposaurus derbianus" after professor Orville Derby, the director of the department of Geology at the National Museum of Brazil.
Hyposaurus | Early discoveries
In the SDSS-based taxonomy, "Halaesus" is a D-type asteroid. Pan-STARRS' survey also characterized it as a D-type, the most common spectral type among the Jupiter trojan population. It has a typical V–I color index of 0.90.
5028 Halaesus | Physical characteristics
Males measure and females in snout–vent length. Body is moderately slender; head is longer than wide, and snout is round in dorsal view and protruding in lateral view. Dorsum and limbs are dark brown with small irregular dots brown and black. There is a silver creamish stripe running from below eye and tympanum to shoulder, and light brown lateral fold from posterior corner of the eye to the groin. Iris is copper coloured.
Hylodes uai | Description
In the SDSS-based taxonomy, "Askalaphus" is a D-type asteroid. It has also been characterized as a D-type by Pan-STARRS' survey. Its V–I color index of 0.94, is typical for most larger Jupiter trojans "(see table below)".
4946 Askalaphus | Physical characteristics
Hyas was a notable archer who was killed by his intended prey. Some stories have him dying after attempting to rob a lion of its cubs. Some have him killed by a serpent, but most commonly he is said to have been gored by a wild boar. His sisters, the Hyades, mourned his death with so much vehemence and dedication that they died of grief. Zeus, in recognition of their familial love, took pity upon them and changed them into stars—the constellation Hyades—and placed them in the head of Taurus, where their annual rising and setting are accompanied by plentiful rain.
Hyas | Mythology
The cluster is estimated to dissipate in another 250 million years. The Pleiades cluster is classified as a Shapley class c and Trumpler class I 3 r n cluster, indicating that it is irregularly shaped and loose, though concentrated at its center and detached from the star-field.
Taurus (constellation) | Features
The tooth number of twenty-two or less was indicated as an autapomorphy, or unique derived trait, of "Bellubrunnus". Several distinguishing features are also present in the limbs of "Bellubrunnus". The large hatchet-shaped deltopectoral crest of the humerus ("hu") or upper arm bone, in this case more precisely in the form of a rounded tongue, is one of the features that indicate that "Bellubrunnus" is a member of Rhamphorhynchidae, but the great length of the humerus in comparison to the length of the femur ("fe") or upper leg bone, with a ratio of 1.4, distinguishes it from other rhamphorhynchids and is a second autapomorphy.
Bellubrunnus | Description
He had the genuine Titan blood; for from the bed of primeval Thaumas his rosy arm consort Electra brought forth two children — from that bed came a river and a messenger of the heavenly ones, Iris quick as the wind and swiftly flowing Hydaspes, Iris travelling on foot and Hydaspes by water. Both had an equal speed on two contrasted paths: Iris among the immortals and Hydaspes among the rivers.""
Hydaspes (mythology) | Nonnus' account
HD 10180, also designated 2MASS J01375356-6030414, is a Sun-like star in the southern constellation Hydrus that is notable for its large planetary system. Since its discovery, at least seven planets, and possibly as many as nine, have been observed orbiting it, making it potentially the largest of all known planetary systems, including the Solar System. (Other stars with a large known number of planets include Kepler-90, TRAPPIST-1, Kepler-11, and 55 Cancri.)
HD 10180 | Introduction
"Pandarus" has been characterized as a D-type asteroid by the survey conducted by Pan-STARRS. It is also a dark D-type in the Tholen classification and in the SDSS-based taxonomy.
2674 Pandarus | Physical characteristics
The HYDRUS packages use a Microsoft Windows based graphical user interface (GUI) to manage the input data required to run the program, as well as for nodal discretization and editing, parameter allocation, problem execution, and visualization of results. All spatially distributed parameters, such as those for various soil horizons, the root water uptake distribution, and the initial conditions for water, heat and solute movement, are specified in a graphical environment. The program offers graphs of the distributions of the pressure head, water content, water and solute fluxes, root water uptake, temperature and solute concentrations in the subsurface at pre-selected times.
Hydrus (software) | Simulated processes
Total length in males is about , and females ; tail lengths are and in males and females respectively.
Hydrophis spiralis | Diagnostic characteristics
Onychohydrus is a genus of beetles in the family Dytiscidae, containing the following species:
Onychohydrus | Introduction
Hydrus has the characteristic steeper-than-vertical (97 degree) drop of all Euro-Fighter coasters. The coaster (a Euro-Fighter 320) is similar to 320+ model Euro-Fighters, but it eliminates the final helix at the end. Elements include a loop, cutback, and heartline roll. There are two eight-person cars, each with lap-bar restraints. The owners of Casino Pier have said that the name Hydrus references the constellation of the same name, and the "Jet Star" and later "Star Jet" names of the previous Casino Pier coasters.
Hydrus (roller coaster) | Layout and theme
Hyphoporus is a genus of beetles in the family Dytiscidae, containing the following species:
Hyphoporus | Introduction
"Hydrus" received one battle star for World War II service.
USS Hydrus (AKA-28) | Post-war
"Thrasymedes" is an assumed, carbonaceous C-type asteroid, while the majority of larger Jupiter trojans are D-type asteroids.
3801 Thrasymedes | Physical characteristics
The mesh generator may be used for defining very general domain geometries, and for discretizing the transport domain into an unstructured finite element mesh. HYDRUS-2D has been recently fully replaced with HYDRUS (2D/3D) as described below.
Hydrus (software) | HYDRUS 2D/3D
Covering a total of 248.9 square degrees or 0.603% of the sky, Horologium ranks 58th in area out of the 88 modern constellations. Its position in the southern celestial hemisphere means the whole constellation is visible to observers south of 23°N. Horologium is bordered by five constellations: Eridanus (the Po river), Caelum (the chisel), Reticulum (the reticle), Dorado (the dolphin/swordfish), and Hydrus (the "male" water snake). The three letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Hor". The official constellation boundaries are defined by a twenty-two-sided polygon ("illustrated in infobox"). In the equatorial coordinate system, the right ascension coordinates of these borders lie between and , while the declination coordinates are between −39.64° and −67.04°.
Horologium (constellation) | Characteristics
The holotype, a subadult male, measures about in snout–vent length. The specimen has a prominent preorbital ridge and moderately heavy supratympapanic fold that continues as a later fold, ending just before to the groin; the tympanum itself is indistinct. The snout is truncate in dorsal view but bluntly rounded when viewed from the side. The finger and toe tips bear large discs. The toes are heavily webbed whereas the finger webbing is moderate. The dorsum is brown with darker pattern. The flanks and the thighs have yellowish markings. The venter is opalescent gold to cream, turning to cream with pinkish tint posteriorly; the chin is opalescent gold.
Hyloscirtus chlorosteus | Description
Hyphydrus ovatus is a species of diving beetles in the family Dytiscidae.
Hyphydrus ovatus | Introduction
The first is a square shaped sternum rather than the oval one found in "E. mexicanus". The second is that the labium only contacts the sternum, rather than inserting into it as it does in "E. mexicanus".
Euagrus formosanus | Physical characteristics
Although 4Q186 is not a horoscope in the Greek sense, it has horoscopic characteristics. Vermes' translation of 4Q186 describes different parts of its subject "him" as in light and in darkness, which determines some characteristics of physiognomy, based on the astrology during an individual's birth (in this case relating to Taurus). This light and darkness could be explained by the location of Taurus above or below the horizon at the moment of birth.
Qumran Physiognomies | Astrological characteristics
Himacerus is a genus of damsel bugs belonging to the family Nabidae, subfamily Nabinae.
Himacerus | Introduction
There are no clamp connections in the epicuticular hyphae, but there are on the hyphae of the tomentum at the base of the pileus.
Crepidotus versutus | Microscopic features
However, this may have been based on a photographic plate that was later rejected. It is listed in the General Catalogue of Variable Stars, but marked as probably constant. The star is about 311 million years old and is radiating 91 times the luminosity of the Sun from its photosphere at an effective temperature of 9,816 K.
Eta1 Hydri | Introduction
H. liberifer can be distinguished from other Heros species due to its small spots that form horizontal lines across the lower half of its body. Other traits of the liberifer are a caudal spot in adult specimen as well as, generally narrower lips than other species.
Heros liberifer | Description
Both HYDRUS-1D and HYDRUS (2D/3D) has been used in hundreds, if not thousands of applications referenced in peer-reviewed journal articles and many technical reports. Both software packages are also used in classrooms of many universities in courses covering Soil Physics, Processes in the Vadose Zone, or Vadose Zone Hydrology. A selected list of hundreds of applications of both HYDRUS software packages are given at: http://www.pc-progress.com/en/Default.aspx?h3d-references http://www.pc-progress.com/en/Default.aspx?h1d-references
Hydrus (software) | Applications
The humerus has an elongated deltopectoral crest that is unwarped. Both dsungaripterids and azhdarchoids show this feature, but only the latter group is typified by such a very thin outer bone wall. Habib concluded that "Bennetazhia" was a member of the Azhdarchoidea, a more encompassing group than the Azhdarchidae.
Bennettazhia | Description
The anterior margin is broadly rounded from both sides. The front of the interantennal ridges are low, oblique and wide, with the back part tend to be more slender, granule and flat. It has weak and narrowly impressed vertex, with median sulcus is being present on its posterior half.
Cyrtodesmus humerosus | Description
HYDRUS-1D traces its roots to the early work of van Genuchten and his SUMATRA and WORM models, as well as later work by Vogel (1987) and Kool and van Genuchten (1989) and their SWMI and HYDRUS models, respectively. While Hermitian cubic finite element numerical schemes were used in SUMATRA and linear finite elements in WORM and the older HYDRUS code for solution of both the water flow and solute transport equations, SWMI used finite differences to solve the flow equation. Various features of these four early models were combined first in the DOS-based SWMI_ST model (Šimůnek et al., 1993), and later in the Windows-based HYDRUS-1D simulator (Šimůnek et al., 1998).
Hydrus (software) | HYDRUS 1D
Eta Hydri b (η Hyi b, η Hydri b), commonly known as HD 11977 b, is an extrasolar planet that is approximately 217 light-years away in the constellation of Hydrus. The presence of the planet around an intermediately massive giant star provides indirect evidence for the existence of planetary systems around A-type stars.
Eta2 Hydri b | Introduction
"Hyas coarctatus" look a lot like the great spider crab ("H. araneus") but has a lyriformed shell. The carapace of a large specimen is up to 60 mm long and 44 mm wide. The colour is greybrown on the dorsal side, sometimes with a bit reddish, the ventral side is dirty white. The rostral horns of "H. coarctatus" are slightly longer and spaced further apart than in "H. araneus". Chelipeds are longer than in "H. araneus". The outer segment of the walking legs is often more or less furry.
Hyas coarctatus | Morphology
The "Haidomyrmodes" holotype gyne has a similar structure to species of "Haidomyrmex". The mandibles very large and well developed with an L-shaped appearance in side view. In both genera the clypeus has a pair of elongated setae and the genae are elongated. The two genera can be told apart by the placement of the bend in the mandible, with "Haidomyrmodes" having a more basal bend, and mandibles that are positioned closer to the head when closed. The holotype is overall approximately with a distinct pair of ocelli and large eyes. The clypeus has a concave structure to it in side view and without and setae.
Haidomyrmodes | Description
Psydrus piceus is a species of beetle in the family Carabidae, the only species in the genus Psydrus.
Psydrus | Introduction