Posts by LukeCEL

by LukeCEL
20.05.2019, 03:39
Forum: Add-on releases
Topic: Populating WLM (and other galaxies) with REAL stars
Replies: 88
Views: 96

Re: Populating WLM (and other galaxies) with REAL stars

CM1215 wrote:I believe it was merged into this thread with the "Populating WLM (and other galaxies) with REAL stars" thread.

I understand that. But these two threads are completely separate, so why was that one not turned into an announcement by itself? Why the merge?
by LukeCEL
20.05.2019, 00:08
Forum: Add-on releases
Topic: Populating WLM (and other galaxies) with REAL stars
Replies: 88
Views: 96

Re: Populating WLM (and other galaxies) with REAL stars

Hi, I know I'm a bit late, but also very confused. I certainly remember a "Extrasolar, Stars and Exoplanets for Celestia" thread started by gironde. What happened to that thread?
by LukeCEL
17.05.2019, 23:40
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 21
Views: 1040

Re: Extrasolar Planets (updated catalogue)

While it's not wholly accurate but you can use the SDSS Catalog as well, since so far, it's the most massive and comprehensive galaxy catalog. Mmm, can you clarify? The SDSS is a huge survey, with many data releases and resulting catalogues. And I couldn't find any of them have galaxy morphological...
by LukeCEL
17.05.2019, 19:18
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 21
Views: 1040

Re: Extrasolar Planets (updated catalogue)

A galaxy catalog is needed, as well as stars within those galaxies, which LukeCEL has already started some time ago. My "stars within galaxies" add-ons are semi-fictional; they shouldn't really be in the main Celestia package. Sure, they represent real stars as accurately as possible. How...
by LukeCEL
15.05.2019, 02:19
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 21
Views: 1040

Re: Extrasolar Planets (updated catalogue)

I line myself up with LukeCEL in the team of the "bit jealous people", because I was also working in my exoplanet catalog. You too? :eek: Funny how so many people were working independently of each other. That being said, I still plan on finishing up and releasing mine soon. Textures are ...
by LukeCEL
14.05.2019, 23:36
Forum: Development
Topic: Celestia 1.7.0 Development Thread
Replies: 410
Views: 19974

Re: Celestia 1.7.0 Development Thread

Thanks for the status update. Can I ask how much of these changes are backwards compatible? If possible, I'd like to do as little as possible with my star databases and cross indices. (Preferably nothing at all, since there are countless other stars.dat files out there). I don't know yet how Gaia na...
by LukeCEL
14.05.2019, 19:58
Forum: Development
Topic: Celestia 1.7.0 Development Thread
Replies: 410
Views: 19974

Re: Celestia 1.7.0 Development Thread

Hi! Can I get a brief summary of what the current plan (and status) is with the database restructuring?

Thanks, LukeCEL
by LukeCEL
14.05.2019, 00:44
Forum: Add-on releases
Topic: Solar System Objects for Celestia
Replies: 39
Views: 1301

Re: Solar System Objects for Celestia

Oh, silly me, I think I remember seeing such a paper, but I didn't bother saving it.

Added after 5 minutes 49 seconds:
Is it this, by any chance? (Thomas et al. 2013) It has an incomplete map of Helene, as well as map-like diagrams of craters and flows.
by LukeCEL
14.05.2019, 00:09
Forum: Add-on releases
Topic: Solar System Objects for Celestia
Replies: 39
Views: 1301

Re: Solar System Objects for Celestia

CM1215 wrote:Can you try to do Helene?

I second this. Helene has a lot of really nice photos, but I haven't seen any textures of it so far.
by LukeCEL
07.05.2019, 19:54
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 21
Views: 1040

Re: Extrasolar Planets (updated catalogue)

Wow, this is really cool. Yours has a lot of advanced stuff like spin-orbit alignment, as well as well as stellar oblateness from v sin i. I am a bit jealous... besides the fact that I was also working on an exoplanet catalog like yours, but you beat me to it :biggrin: P.S. What source did you use f...
by LukeCEL
07.05.2019, 19:45
Forum: Add-on releases
Topic: Bee Zed + Heliopause
Replies: 6
Views: 525

Re: Bee Zed + Heliopause

Update: 2015 BZ509 has the name and number 514107 Kaʻepaokaʻawela. (Source)
by LukeCEL
04.05.2019, 17:03
Forum: Celestia Users
Topic: Another communication method for Celestia
Replies: 18
Views: 451

Re: Another communication method for Celestia

SpaceFanatic64 wrote:Wait a second, it's actually called r/CelestiaSim. My mistake

Why are we going ahead with this r/celestiasoftware when this one already exists?
by LukeCEL
28.04.2019, 03:22
Forum: Add-on development
Topic: 55 Cancri
Replies: 9
Views: 342

Re: 55 Cancri

fyr02, do you happen to be using https://www.swift.psu.edu/secure/toop/convert.htm as the RA/Dec converter? If so, I recommend using http://www.astrouw.edu.pl/~jskowron/ra-dec/ instead, which is more flexible. It allows up to 4 decimal degrees for the arcseconds.
by LukeCEL
21.04.2019, 14:39
Forum: Add-on development
Topic: 55 Cancri
Replies: 9
Views: 342

Re: 55 Cancri

Lafuente_Astronomy wrote:From what catalogs does the exoplanet catalog you're making take from?

I'm using the NASA Exoplanet Archive as the main source of host stars and exoplanets, and I'm adding binary stars by hand, with parameters from a bunch of different sources.
by LukeCEL
21.04.2019, 02:33
Forum: Add-on development
Topic: 55 Cancri
Replies: 9
Views: 342

Re: 55 Cancri

Hi fyr02 , Before you go through the trouble, please know that I'm working on an exoplanet catalog. It includes definitions for many binary stars, including 55 Cnc AB. Here's the STC code: # Parameters for 55 Cnc B from Newton et al. (2016), ApJ 834 (1), 85 # "The Hα Emission of Nearby M Dwarfs...
by LukeCEL
28.03.2019, 21:17
Forum: Ideas & News
Topic: Increase the size of galactic and star bases
Replies: 25
Views: 998

Re: Increase the size of galactic and star bases

Not sure if this is the right link, I found http://www.klima-luft.de/steinicke/ngcic/ngcic_e.htm which has a download link for an XLS file. But I'll still look for more sources, especially related to distances and other properties. Also, a bit off-topic, but a bunch of my add-ons finally got updated...
by LukeCEL
27.03.2019, 20:01
Forum: Ideas & News
Topic: Increase the size of galactic and star bases
Replies: 25
Views: 998

Re: Increase the size of galactic and star bases

I am very worried about how the tool calculates the orientation of the galaxy relative to the Earth. Or was the necessary information in the source? The tool takes the inclination and position angle of the galaxy. Those two are enough to position the plane of the galaxy, but you need a third parame...
by LukeCEL
26.03.2019, 06:24
Forum: Ideas & News
Topic: Increase the size of galactic and star bases
Replies: 25
Views: 998

Re: Increase the size of galactic and star bases

The main source, Steinicke's NGC/IC catalog, is probably fine. However, I'm having trouble tracking down the supplementary sources. There might also be newer sources for nearby galaxies.
by LukeCEL
25.03.2019, 22:01
Forum: Ideas & News
Topic: Increase the size of galactic and star bases
Replies: 25
Views: 998

Re: Increase the size of galactic and star bases

Well, is it possible to add stars from the Gaia Archives even though they are not part of either Tycho or Simbad? Art Blos mentioned this, but 2.5 million is the number of real stars you can add using stars.dat. I guess you can add as many stars as you want using STC files, but STC files are much s...
by LukeCEL
24.03.2019, 22:21
Forum: Ideas & News
Topic: Increase the size of galactic and star bases
Replies: 25
Views: 998

Re: Increase the size of galactic and star bases

Here's a stars.dat that contains stars from the Hipparcos and Tycho-2 catalogues, with distances from Gaia DR2 or Hipparcos parallaxes. All in all, it has 2,448,220 stars. This is close to the maximum amount of real stars that can be added to Celestia, since the stars.dat format only works for the T...

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