<p>Partial answer to</p>
<blockquote>
<p>Is it possible i.e. with Python or other (I am only basic with soft)?</p>
</blockquote>
<h3>Yes!</h3>
<p>Use <a href="https://rhodesmill.org/skyfield/" rel="nofollow noreferrer">Skyfield</a>.</p>
<p>As long as you can muster a little Python you can search for events, make topographical maps of event times and elevations, or even put it in a loop and find optimized locations.</p>
<p>The nice thing about learning to use Skyfield is that you can then do all your event searches, plots, predictions etc. this way in the future, and it's a great way to improve Python skills as well.</p>
<p>Skyfield also has a Github page where there are <a href="https://github.com/skyfielders/python-skyfield/discussions" rel="nofollow noreferrer">discussion</a> and <a href="https://github.com/skyfielders/python-skyfield/issues" rel="nofollow noreferrer">issues</a> pages that are both very active.</p>
<p>You can also view other Stack Exchange questions tagged with Skyfield <a href="https://astronomy.stackexchange.com/questions/tagged/skyfield">here</a> and in <a href="https://space.stackexchange.com/questions/tagged/skyfield">Space Exploration SE</a>.</p>
<hr />
<p>See also:</p>
<ul>
<li><a href="https://astronomy.stackexchange.com/a/30141/7982">Sunset on [Mountain] from [Viewing Point]</a></li>
<li><a href="https://astronomy.stackexchange.com/q/42093/7982">How to determine when Sun/Moon is aligned to two location on Earth&#39;s surface?</a></li>
<li><a href="https://astronomy.stackexchange.com/q/13488/7982">Where can I find the positions of the planets, stars, moons, artificial satellites, etc. and visualize them?</a></li>
<li><a href="https://astronomy.stackexchange.com/a/18029/7982">Inverse of the sunrise equation - finding locations with a given sunrise time on a given day</a></li>
</ul>

CC BY-SA 4.0
2021-04-30T01:07:38.533Z
2021-04-30T01:07:38.533Z
uhoh
<p>Recently I found a fantastic website <a href="https://in-the-sky.org/" rel="nofollow noreferrer">in-the-sky.org</a>, from here we can simply pick up any astronomical event and check its visibility in any part of the Globe.
For occultations, for example, we have very nice maps like this below:</p>
<p><a href="https://i.sstatic.net/g7tvr.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/g7tvr.png" alt="enter image description here" /></a></p>
<p>There are a lot of conjunctions, occultations, eclipses, and so on described fairly in detail. I think it's the best website so far for people making Astro calendars.</p>
<p>The problem is, that if I checked some conjunction i.e. <a href="https://in-the-sky.org/news.php?id=20210819_20_100" rel="nofollow noreferrer">Mercury with Mars on August 19, 202</a>1  I spent quite a lot of time checking which located around the Globe is the best for watching this event. I took into consideration the solar depression, not lower than 6 degrees (end of civil twilight), and an altitude of these 2 bodies above the horizon (not lower than 3 degrees due to atmospheric extinction). Finally, my hand-sketched maps are looking like this:</p>
<p><a href="https://i.sstatic.net/zQLns.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/zQLns.png" alt="Day and Night Map Timeanddate.com" /></a></p>
<p>plotted in the Day &amp; Night Map at <a href="https://www.timeanddate.com/worldclock/sunearth.html" rel="nofollow noreferrer">timeanddate.com</a></p>
<p><a href="https://i.sstatic.net/pDcbP.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/pDcbP.jpg" alt="enter image description here" /></a></p>
<p>sketch plotted in Google Maps</p>
<p><a href="https://i.sstatic.net/J2Mhi.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/J2Mhi.png" alt="enter image description here" /></a></p>
<p>Circumstances checked with <a href="https://stellarium-web.org/" rel="nofollow noreferrer">stellarium-web.org</a></p>
<p>So basically is quite a lot of work by checking which location is the most appropriate to watch the moment of conjunction ideally (I mean the moment of biggest approach these 2 planets, which lasts maybe...30mins or so). Concluding I would like to ask about the possibility of <strong>auto calculate</strong> stuff like this. If for example, I would put in one column the min solar depression, in another column the min altitude of these planets, some tool would bring me the map as presented above?</p>
<p>Is it possible i.e. with Python or other (I am only basic with soft)?</p>
<p>Or do you know web services, which do the calculation such as this for you?</p>
<p>I fund some query here:</p>
<p><a href="https://astronomy.stackexchange.com/questions/11141/how-to-calculate-conjunctions-of-2-planets">How to calculate conjunctions of 2 planets</a></p>
<p>but it applies to calculate the dates and geometrical circumstances of the conjunctions. I would like to have something in the map as presented above.</p>

<observational-astronomy><amateur-observing><sky-survey>
Calculating and mapping the best visibility of celestial occurrence
Geographos
# Calculating and mapping the best visibility of celestial occurrence

(Asked by: username_0 on 2021-04-29)

Recently I found a fantastic website [in-the-sky.org](https://in-the-sky.org/), from here we can simply pick up any astronomical event and check its visibility in any part of the Globe.
For occultations, for example, we have very nice maps like this below:

[![enter image description here](https://i.sstatic.net/g7tvr.png)](https://i.sstatic.net/g7tvr.png)

There are a lot of conjunctions, occultations, eclipses, and so on described fairly in detail. I think it's the best website so far for people making Astro calendars.

The problem is, that if I checked some conjunction i.e. [Mercury with Mars on August 19, 202](https://in-the-sky.org/news.php?id=20210819_20_100)1 I spent quite a lot of time checking which located around the Globe is the best for watching this event. I took into consideration the solar depression, not lower than 6 degrees (end of civil twilight), and an altitude of these 2 bodies above the horizon (not lower than 3 degrees due to atmospheric extinction). Finally, my hand-sketched maps are looking like this:

[![Day and Night Map Timeanddate.com](https://i.sstatic.net/zQLns.png)](https://i.sstatic.net/zQLns.png)

plotted in the Day & Night Map at [timeanddate.com](https://www.timeanddate.com/worldclock/sunearth.html)

[![enter image description here](https://i.sstatic.net/pDcbP.jpg)](https://i.sstatic.net/pDcbP.jpg)

sketch plotted in Google Maps

[![enter image description here](https://i.sstatic.net/J2Mhi.png)](https://i.sstatic.net/J2Mhi.png)

Circumstances checked with [stellarium-web.org](https://stellarium-web.org/)

So basically is quite a lot of work by checking which location is the most appropriate to watch the moment of conjunction ideally (I mean the moment of biggest approach these 2 planets, which lasts maybe...30mins or so). Concluding I would like to ask about the possibility of **auto calculate** stuff like this. If for example, I would put in one column the min solar depression, in another column the min altitude of these planets, some tool would bring me the map as presented above?

Is it possible i.e. with Python or other (I am only basic with soft)?

Or do you know web services, which do the calculation such as this for you?

I fund some query here:

[How to calculate conjunctions of 2 planets](https://astronomy.stackexchange.com/questions/11141/how-to-calculate-conjunctions-of-2-planets)

but it applies to calculate the dates and geometrical circumstances of the conjunctions. I would like to have something in the map as presented above.

**Tags:** observational-astronomy, amateur-observing, sky-survey


---

## 1 answers

### Answer by username_1 on 2021-04-30. Score: 2 | Accepted answer

Partial answer to

> Is it possible i.e. with Python or other (I am only basic with soft)?

### Yes!

Use [Skyfield](https://rhodesmill.org/skyfield/).

As long as you can muster a little Python you can search for events, make topographical maps of event times and elevations, or even put it in a loop and find optimized locations.

The nice thing about learning to use Skyfield is that you can then do all your event searches, plots, predictions etc. this way in the future, and it's a great way to improve Python skills as well.

Skyfield also has a Github page where there are [discussion](https://github.com/skyfielders/python-skyfield/discussions) and [issues](https://github.com/skyfielders/python-skyfield/issues) pages that are both very active.

You can also view other Stack Exchange questions tagged with Skyfield [here](https://astronomy.stackexchange.com/questions/tagged/skyfield) and in [Space Exploration SE](https://space.stackexchange.com/questions/tagged/skyfield).

---

See also:

* [Sunset on [Mountain] from [Viewing Point]](https://astronomy.stackexchange.com/a/30141/7982)
* [How to determine when Sun/Moon is aligned to two location on Earth's surface?](https://astronomy.stackexchange.com/q/42093/7982)
* [Where can I find the positions of the planets, stars, moons, artificial satellites, etc. and visualize them?](https://astronomy.stackexchange.com/q/13488/7982)
* [Inverse of the sunrise equation - finding locations with a given sunrise time on a given day](https://astronomy.stackexchange.com/a/18029/7982)


---

