<p><em>These steps are in there for credit</em></p>

<p>I used Stellarium to simulate a sunrise, and took screenshots of the progression. Each screen shot was 2 seconds apart, and stellarium was accelerated to 10 minutes a second.</p>

<p>Then, using <a href="http://www.imagemagick.org/script/index.php" rel="nofollow noreferrer">imagemagik</a> to crop batch those 13 images with this command:</p>

<pre><code>mogrify -crop 1280 1024 *.png
</code></pre>

<p>(those numbers are the size of my screen. I cropped to get rid of my second screen)</p>

<p>Next I put the images into <a href="http://lokeshdhakar.com/projects/color-thief/" rel="nofollow noreferrer">Color Thief</a> and got the pallet of each image. This is the result of those 13 images:</p>

<p><img src="https://i.sstatic.net/ynjc6.png" alt=""></p>

<p><img src="https://i.sstatic.net/0ETHd.png" alt=""></p>

<p><img src="https://i.sstatic.net/xYZ46.png" alt=""></p>

<p><img src="https://i.sstatic.net/hoYbs.png" alt=""></p>

<p><img src="https://i.sstatic.net/U81BG.png" alt=""></p>

<p><img src="https://i.sstatic.net/QcgiU.png" alt=""></p>

<p><img src="https://i.sstatic.net/kpTBE.png" alt=""></p>

<p><img src="https://i.sstatic.net/Mvqfi.png" alt=""></p>

<p><img src="https://i.sstatic.net/Vycg3.png" alt=""></p>

<p><img src="https://i.sstatic.net/SAIRI.png" alt=""></p>

<p><img src="https://i.sstatic.net/MdWa8.png" alt=""></p>

<p><img src="https://i.sstatic.net/nesvm.png" alt=""></p>

<p><img src="https://i.sstatic.net/gqbAg.png" alt=""></p>

<p>Those are the colour pallets. You can pick whatever colours you want from them with a colour picker, such as KColorChooser.</p>

CC BY-SA 4.0
2024-02-11T22:37:32.227Z
If any other future googlers need it, I have gone through this and color picked each square. The RGB values are in this file: https://pastebin.com/bMgcMTe9
Zaya
CC BY-SA 3.0
2014-11-02T17:26:46.040Z
Thanks. I'll see what I can make of these. I think the thing to do though is capture the sun itself, but careful selection from these palettes may give the right result too.
orome
CC BY-SA 3.0
2014-11-02T09:51:02.013Z
2014-11-02T09:51:02.013Z
Tim
<p><a href="https://en.wikipedia.org/wiki/Dawn_simulation" rel="nofollow">"Dawn simulators"</a> are used to simulate a natural sunrise, or at least the physiological effects of one.</p>

<p>What temporal sequence of color values (e.g., hue, saturation, brightness, and timing) corresponds to a typical spring or summer sunrise? Are the methods for calculating changes in these values based on season?</p>

CC BY-SA 3.0
2014-10-30T15:41:46.913Z
@barrycarter: Another approach I might try is to run a sunrise in a simulator (like Starry Night) and get the color values off of the image of the sun on the screen. But I'm not sure whether that will give me what I'm looking for, either from an astronomical perspective (is capturing the sun's color in such images really what I'm looking for?) or a computer-graphical one (how do I capture the right pixels?).
orome
CC BY-SA 3.0
2014-10-30T15:57:49.063Z
@barrycarter: Yes, that's what I'd be concerned about. Also it does sound like quite a project. This information must be around somewhere.
orome
<the-sun><amateur-observing>
What are the color progression of a typical sunrise?
orome
# What are the color progression of a typical sunrise?

(Asked by: username_0 on 2014-10-30)

["Dawn simulators"](https://en.wikipedia.org/wiki/Dawn_simulation) are used to simulate a natural sunrise, or at least the physiological effects of one.

What temporal sequence of color values (e.g., hue, saturation, brightness, and timing) corresponds to a typical spring or summer sunrise? Are the methods for calculating changes in these values based on season?

**Tags:** the-sun, amateur-observing
> **Comments:**
> **username_0**: @barrycarter: Another approach I might try is to run a sunrise in a simulator (like Starry Night) and get the color values off of the image of the sun on the screen. But I'm not sure whether that will give me what I'm looking for, either from an astronomical perspective (is capturing the sun's color in such images really what I'm looking for?) or a computer-graphical one (how do I capture the right pixels?).  
> **username_0**: @barrycarter: Yes, that's what I'd be concerned about. Also it does sound like quite a project. This information must be around somewhere.  

---

## 1 answers

### Answer by username_1 on 2014-11-02. Score: 2

These steps are in there for credit
I used Stellarium to simulate a sunrise, and took screenshots of the progression. Each screen shot was 2 seconds apart, and stellarium was accelerated to 10 minutes a second.
Then, using imagemagik to crop batch those 13 images with this command:
mogrify -crop 1280 1024 *.png

(those numbers are the size of my screen. I cropped to get rid of my second screen)
Next I put the images into Color Thief and got the pallet of each image. This is the result of those 13 images:













Those are the colour pallets. You can pick whatever colours you want from them with a colour picker, such as KColorChooser.

> **Comments:**
> **username_0**: Thanks. I'll see what I can make of these. I think the thing to do though is capture the sun itself, but careful selection from these palettes may give the right result too.  
> **username_2**: If any other future googlers need it, I have gone through this and color picked each square. The RGB values are in this file: https://pastebin.com/bMgcMTe9  

---

