<p>Not $\lambda \omicron$ or $\Lambda. \mathrm{O}.$ but $\lambda_⊙{}^\circ$.</p>

<p>This is the solar ecliptic longitude, the position of the sun relative to the vernal equinox, in degrees clockwise. This varies from 0 at the spring equinox, over 360 degrees. The Solar longitude is a way of giving the date of a meteor shower.</p>

<p>The effects of leap days mean that the date of the peak of a meteor shower will vary from year to year by a few days. However, the solar longitude at a meteor's shower's peak should remain the same from year to year. That is any variation in the solar longitude peak represents a real astronomical variation in the shower, not just an artefact of how we structure the calendar. </p>

CC BY-SA 3.0
2016-11-19T19:51:01.340Z
Thanks Jim, is there a name for the circle with the dot in it?
MiscellaneousUser
CC BY-SA 3.0
2016-11-19T19:58:24.230Z
Well Bones,  It is the symbol for "sun", unicode [U+2609](http://unicode.org/cldr/utility/character.jsp?a=2609)
James K
CC BY-SA 3.0
2016-11-19T19:42:57.413Z
2016-11-19T19:42:57.413Z
James K
<p>I see for example, the L.O. of the Quadrantids is 283.16 and Lyrids is 32.32.   </p>

<p>src: <a href="https://en.wikipedia.org/wiki/List_of_meteor_showers" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/List_of_meteor_showers</a></p>

<meteor-shower>
In relation to Meteor Showers, what is meant by Lambda Omicron?
MiscellaneousUser
# In relation to Meteor Showers, what is meant by Lambda Omicron?

(Asked by: username_0 on 2016-11-19)

I see for example, the L.O. of the Quadrantids is 283.16 and Lyrids is 32.32.

src: <https://en.wikipedia.org/wiki/List_of_meteor_showers>

**Tags:** meteor-shower


---

## 1 answers

### Answer by username_1 on 2016-11-19. Score: 1 | Accepted answer

Not $\lambda \omicron$ or $\Lambda. \mathrm{O}.$ but $\lambda\_⊙{}^\circ$.

This is the solar ecliptic longitude, the position of the sun relative to the vernal equinox, in degrees clockwise. This varies from 0 at the spring equinox, over 360 degrees. The Solar longitude is a way of giving the date of a meteor shower.

The effects of leap days mean that the date of the peak of a meteor shower will vary from year to year by a few days. However, the solar longitude at a meteor's shower's peak should remain the same from year to year. That is any variation in the solar longitude peak represents a real astronomical variation in the shower, not just an artefact of how we structure the calendar.

> **Comments:**
> **username_0**: Thanks Jim, is there a name for the circle with the dot in it?  
> **username_1**: Well Bones,  It is the symbol for "sun", unicode [U+2609](http://unicode.org/cldr/utility/character.jsp?a=2609)  

---

