<p>According to <a href="http://en.wikipedia.org/wiki/Supergalactic_coordinate_system" rel="nofollow">Wikipedia</a>, the origin of the system is:</p>

<p><code>The zero point (SGB=0°, SGL=0°) lies at (l=137.37°, b=0°). In J2000 equatorial coordinates, this is approximately (2.82 h, +59.5°).</code></p>

<p>In the same article there is <a href="http://cdsads.u-strasbg.fr/cgi-bin/nph-data_query?bibcode=2000MNRAS.312..166L&amp;db_key=AST&amp;link_type=ARTICLE" rel="nofollow">a recent referred paper</a> on this topic, which explains <code>[The zero point] is one of the two regions where the SGP is crossed by the Galactic plane.</code></p>

<p>Perhaps you already know <a href="http://fisherka.csolutionshosting.net/astronote/Structure/Supergal/Supergalacticcoords.html" rel="nofollow">this website</a>, which shows many good pictures. I was trying to find a better figure, but I guess you have to push your imagination according to the definition.</p>

<p>EDIT: According to <a href="http://books.google.co.jp/books?id=f-l9bB-7AQMC&amp;pg=PA378&amp;lpg=PA378&amp;dq=supergalactic%20center&amp;source=bl&amp;ots=Z1c-n36an9&amp;sig=VSjHder9IA4-DVvr2samzWw7lGA&amp;hl=en&amp;sa=X&amp;ei=rVBlVO4WotqaBZCQgMgG&amp;ved=0CBwQ6AEwADgK#v=onepage&amp;q=supergalactic%20center&amp;f=false" rel="nofollow">this</a>, SG coordinates are similar to the galactic ones, so that the North Supergalactic Pole is defined in Galactic coordinates, which means that they have the same origin (i.e., the Sun).</p>

CC BY-SA 3.0
2014-11-13T12:02:56.420Z
Thanks for your answer. I had knowledge about the article, but not the website. I dont know if thats the center point I want to know about (origin from which the observer is, not where the latitude and longitude starts counting). Im updating my question with a screenshot of the model I have for Galactic Coordinates adding that as reference to the question.
hawaii
CC BY-SA 3.0
2014-11-14T00:52:42.953Z
I added a new reference which should address your question.
Py-ser
CC BY-SA 3.0
2014-11-13T09:39:07.830Z
2014-11-14T00:52:06.553Z
2014-11-14T00:52:06.553Z
Py-ser
<p>I'm trying to build a 3D visualization of the Supergalactic coordinate system and couldn't find any reference to where the center point should be (the Sun, galactic center, the Earth, etc). </p>

<p>Also I already tried to look into some articles and books, but they only refer to the zero point related to the galactic coordinates.</p>

<p>Where should it be?</p>

<p>Could I use this model as the reference for the Supergalactic Coordinate system, starting to count the SGL (L) and SGB (B) from the yellow line?</p>

<p>It is still unclear to me if (l=137.37 b=0) indicates just the direction of the center of the Supergalactic Coordinates System.</p>

<p>Note: The Sun is being used as the center point.</p>

<p><img src="https://i.sstatic.net/6QsVC.png" alt="Galactic Coordinates"></p>

<p>Plano Galactico translates into Galactic Plane.</p>

<p>Centro Galactico translates into Galactic Center.</p>

<observational-astronomy><visualization>
Where is the center point for the Supergalactic coordinate system?
hawaii
# Where is the center point for the Supergalactic coordinate system?

(Asked by: username_0 on 2014-11-12)

I'm trying to build a 3D visualization of the Supergalactic coordinate system and couldn't find any reference to where the center point should be (the Sun, galactic center, the Earth, etc).

Also I already tried to look into some articles and books, but they only refer to the zero point related to the galactic coordinates.

Where should it be?

Could I use this model as the reference for the Supergalactic Coordinate system, starting to count the SGL (L) and SGB (B) from the yellow line?

It is still unclear to me if (l=137.37 b=0) indicates just the direction of the center of the Supergalactic Coordinates System.

Note: The Sun is being used as the center point.

![Galactic Coordinates](https://i.sstatic.net/6QsVC.png)

Plano Galactico translates into Galactic Plane.

Centro Galactico translates into Galactic Center.

**Tags:** observational-astronomy, visualization

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## 1 answers

### Answer by username_1 on 2014-11-13. Score: 0 | Accepted answer

According to [Wikipedia](http://en.wikipedia.org/wiki/Supergalactic_coordinate_system), the origin of the system is:

`The zero point (SGB=0°, SGL=0°) lies at (l=137.37°, b=0°). In J2000 equatorial coordinates, this is approximately (2.82 h, +59.5°).`

In the same article there is [a recent referred paper](http://cdsads.u-strasbg.fr/cgi-bin/nph-data_query?bibcode=2000MNRAS.312..166L&db_key=AST&link_type=ARTICLE) on this topic, which explains `[The zero point] is one of the two regions where the SGP is crossed by the Galactic plane.`

Perhaps you already know [this website](http://fisherka.csolutionshosting.net/astronote/Structure/Supergal/Supergalacticcoords.html), which shows many good pictures. I was trying to find a better figure, but I guess you have to push your imagination according to the definition.

EDIT: According to [this](http://books.google.co.jp/books?id=f-l9bB-7AQMC&pg=PA378&lpg=PA378&dq=supergalactic%20center&source=bl&ots=Z1c-n36an9&sig=VSjHder9IA4-DVvr2samzWw7lGA&hl=en&sa=X&ei=rVBlVO4WotqaBZCQgMgG&ved=0CBwQ6AEwADgK#v=onepage&q=supergalactic%20center&f=false), SG coordinates are similar to the galactic ones, so that the North Supergalactic Pole is defined in Galactic coordinates, which means that they have the same origin (i.e., the Sun).

> **Comments:**
> **username_0**: Thanks for your answer. I had knowledge about the article, but not the website. I dont know if thats the center point I want to know about (origin from which the observer is, not where the latitude and longitude starts counting). Im updating my question with a screenshot of the model I have for Galactic Coordinates adding that as reference to the question.  
> **username_1**: I added a new reference which should address your question.  

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