Posts by LukeCEL

by LukeCEL
10.07.2021, 09:14
Forum: Modelling
Topic: Asteroid Shape model collection
Replies: 16
Views: 1900

Re: Asteroid Shape model collection

trappistplanets wrote:it needs to be on the center of mass so it rotates correctly in celestia

I'm not sure where the actual center of mass is, but you could probably get it to rotate about whatever point you want by using the MeshCenter parameter.
by LukeCEL
07.07.2021, 23:22
Forum: Modelling
Topic: Asteroid Shape model collection
Replies: 16
Views: 1900

Re: Asteroid Shape model collection

Not sure which of the models is the most accurate, but I think Hektor is known to be a contact binary, in which case Model B would be the closest to reality.
by LukeCEL
06.07.2021, 23:01
Forum: Modelling
Topic: Asteroid Shape model collection
Replies: 16
Views: 1900

Re: Asteroid Shape model collection

Hey everyone, sorry for the late reply. Here are some shape models of 624 Hektor from Josef Ďurech (via Franck Marchis whom I emailed).

Models A, B, and C are the convex lightcurve models, a contact binary model, and an separate binary model respectively.
by LukeCEL
24.05.2021, 02:01
Forum: Modelling
Topic: Asteroid Shape model collection
Replies: 16
Views: 1900

Re: Asteroid Shape model collection

I also have a model of the near-Earth asteroid (214869) 2007 PA8. This one I also got from emailing Marina Brozović, who was the lead author of this paper: " Goldstone radar evidence for short-axis mode non-principal-axis rotation of near-Earth asteroid (214869) 2007 PA8 ". The format of t...
by LukeCEL
28.01.2021, 21:48
Forum: Add-on releases
Topic: Populating WLM (and other galaxies) with REAL stars
Replies: 83
Views: 30990

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

Hello everyone! I'm currently on hiatus from Celestia-related stuff, but in the meantime I have a small add-on. This adds the globular cluster in Wolf-Lundmark-Melotte (WLM). Parameters from Stephens et al. (2006) : "WLM-1: An old, Nonrotating, Gravitationally Unperturbed, Highly Elliptical Ext...
by LukeCEL
07.01.2021, 23:10
Forum: Help Central
Topic: How to rotate a dsc mesh 90 degrees?
Replies: 4
Views: 1568

Re: How to rotate a dsc mesh 90 degrees?

Could you give some more details? In what direction do you want to rotate your model 90 degrees?
by LukeCEL
06.01.2021, 05:15
Forum: Add-on releases
Topic: SevenSpheres' Addons
Replies: 66
Views: 18668

Re: SevenSpheres' Addons

Hi Endeavor35 , It seems that Celestia can't find the proper parent bodies. The first thing I would do is to check that the files m_32.stc and andromeda_galaxy.stc are there - the latest versions can be downloaded here and here , respectively. I also see that you're using macOS - unfortunately macOS...
by LukeCEL
24.12.2020, 23:35
Forum: Celestia Users
Topic: Celestia Motherlode archive on GitHub
Replies: 4
Views: 3222

Re: Celestia Motherlode archive on GitHub

Wonderful! Thanks for bringing the Motherlode back up. :clap:

Adirondack wrote:Please note: For security reasons direct file uploads are no longer available.

Can you clarify what this means?
by LukeCEL
11.11.2020, 22:16
Forum: Utilities
Topic: Utilities 2017
Replies: 12
Views: 6540

Re: Utilities 2017

A while ago I compiled the cmodview utility on my computer. I'm not sure if it'll work on macOS Catalina, but I'll post it here.
by LukeCEL
26.10.2020, 16:14
Forum: Add-on development
Topic: Elliptical and Lenticular Galaxies: An Experiment
Replies: 13
Views: 4282

Re: Elliptical and Lenticular Galaxies: An Experiment

it would be better if luke showed you how to change colors and brighten it so you get get it brighter and a creamy white as in the pic of the real thing The colors are derived from color indices from two papers ( Buta et al. (1994) and Buta et al. (1995) ); I transformed them using FarGetaNik's col...
by LukeCEL
21.10.2020, 19:57
Forum: Add-on development
Topic: Request WD 1586 and its planet WD 1586 b
Replies: 7
Views: 1786

Re: Request WD 1586 and its planet WD 1586 b

That great resource has WD 1856 b, not WD 1586 b. I know they are easy to mix up 1856......1586.... You're right, they're easy to mix up... I even wrote 1586 in my own post. :insane: But it looks like the article https://gadgets.ndtv.com/science/news/exoplanet-wd-1586b-discovered-nasa-tess-2296737 ...
by LukeCEL
20.10.2020, 21:04
Forum: Add-on development
Topic: Request WD 1586 and its planet WD 1586 b
Replies: 7
Views: 1786

Re: Request WD 1586 and its planet WD 1586 b

I would recommend Sirius_Alpha's exoplanet catalogue. It has all known exoplanets and is updated monthly, and it has WD 1586 b.
by LukeCEL
17.10.2020, 19:54
Forum: Add-on releases
Topic: Updated Binary Star Catalogue
Replies: 1
Views: 1109

Re: Updated Binary Star Catalogue

Here's a small update to this file - it adds a few missing TYC and HD designations not present in the earlier file.
by LukeCEL
14.10.2020, 22:06
Forum: Add-on releases
Topic: Updated Binary Star Catalogue
Replies: 1
Views: 1109

Updated Binary Star Catalogue

Hi everyone, A while ago on the Motherlode, I uploaded a catalogue of binary or multiple stars in Celestia, replacing 130 or so stars (with Bayer or Flamsteed designations) with binary systems using available data. Unfortunately, at the time of writing the Motherlode is still not functional, so I ca...
by LukeCEL
09.09.2020, 02:39
Forum: Add-on releases
Topic: Extrasolar, Stars and Exoplanets for Celestia
Replies: 90
Views: 83519

Re: Extrasolar, Stars and Exoplanets for Celestia

Here's a recently-discovered triple star system. TIC 278825952 consists of three stars, two of which are similar and on a tight, nearly circular orbit, and the third, which is on an unusually circular orbit around the two. Parameters from Mitnyan et al. (2020) . Barycenter "TIC 278825952" ...
by LukeCEL
31.08.2020, 16:23
Forum: Help Central
Topic: I'll need some help with the globular clusters
Replies: 4
Views: 1527

Re: I'll need some help with the globular clusters

Hi Spaceman ! I tried your DSC code and it worked for me. MagniCluster.png The only "wrong" with your DSC file is that the RA is too high - for DSC files the RA is in fractional hours, not degrees, so it goes from 0 to 24. However, the globular will still work, it'll just be placed in an u...
by LukeCEL
18.08.2020, 01:15
Forum: Add-on releases
Topic: Extrasolar, Stars and Exoplanets for Celestia
Replies: 90
Views: 83519

Re: Extrasolar, Stars and Exoplanets for Celestia

Here's a very low-mass eclipsing binary. NGTS J0930-18 has an M0V star and a companion just above the hydrogen-burning limit. Parameters from Acton et al. (2020) . Barycenter "NGTS J0930-18" { RA 142.56666667 Dec -18.84267222 Distance 742.614 } "NGTS J0930-18 A" { OrbitBarycenter...
by LukeCEL
14.08.2020, 01:26
Forum: Add-on releases
Topic: Populating WLM (and other galaxies) with REAL stars
Replies: 83
Views: 30990

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

Here is an update to the Draco Dwarf add-on. The main change is a new orbital definition for the symbiotic star [ALS82] C1, also known as Draco C1. The parameters come from Lewis et al. (2020): "Geometry of the Draco C1 Symbiotic Binary".
by LukeCEL
06.08.2020, 21:10
Forum: Add-on development
Topic: Preliminary release of Red Supergiant catalog
Replies: 16
Views: 3629

Re: Preliminary release of Red Supergiant catalog

nussun wrote:I'm not sure what you mean

Basically citing the sources you used for the catalog.
by LukeCEL
06.08.2020, 20:28
Forum: Add-on releases
Topic: star-binary
Replies: 5
Views: 1236

Re: star-binary

Hi, what source(s) did you use for all the binary orbits?

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