Satellite orbit and rotation #142
Conversation
This commit updates: - Eris: Secondary orbit - Orcus: Mutual orbit - Salacia: Secondary orbit - G!kun: Secondary orbit and primary orientation (assume edge on rotation during occultation). Tidally-locked objects are now oriented so that their meridian points at object they are locked to.
data/dwarfplanets.ssc
Outdated
| } | ||
| LunarLambert 0.5 | ||
| GeomAlbedo 0.231 | ||
| InfoURL "https://en.wikipedia.org/wiki/90482_Orcus" | ||
| } | ||
|
|
||
| # Orbit from Grundy et al. (2019), Icarus 334, 62-78 | ||
| # "Mutual orbit orientations of transneptunian binaries" | ||
| # https://ui.adsabs.harvard.edu/abs/2019Icar..334...62G/abstract |
There was a problem hiding this comment.
May I suggest that this freely-accessible link be used instead? http://www2.lowell.edu/users/grundy/abstracts/2019.TNB_orbits.html
(same applies to the other instances where this paper is cited)
There was a problem hiding this comment.
Sounds good; suggestion added and will be in the next commit.
data/outersys.ssc
Outdated
| @@ -530,7 +546,7 @@ ReferencePoint "Lempo-Hiisi" "Sol" | |||
| # Colors from Grundy et al. (2015), Icarus 257, p. 130-138 | |||
| # "The mutual orbit, mass, and density of the large transneptunian binary system Varda and Ilmarë" | |||
| # https://ui.adsabs.harvard.edu/abs/2015Icar..257..130G/abstract | |||
| ReferencePoint "Varda-Ilmare" "Sol" | |||
| ReferencePoint "Varda-Ilmar\u00EB" "Sol" | |||
There was a problem hiding this comment.
Is there a need to do this on current versions of Celestia? AFAIK, with the introduction of TTF fonts, it should be possible to input special characters directly in data files.
There was a problem hiding this comment.
No idea. I can definitely just go with inputting the special character, but I don't know if that breaks stuff somewhere.
data/outersys.ssc
Outdated
| Inclination 133.9981188 | ||
| AscendingNode 247.8337901 |
There was a problem hiding this comment.
Too much precision for what the source data allows?
There was a problem hiding this comment.
Fixed; they are now 134 and 248 respectively.
Lempo system now has Lempo System barycenter, which Lempo-Hiisi and Paha both orbit. The three objects also have masses now. Fixes: - Updated link for Grundy et al. (2019) "Mutual orbit orientations of transneptunian binaries" - Ilmarë is now directly written as such in the files. - Fixed G!kun's orientation having way too much precision.
- Updated Xiangliu's orbital formatting. - G!kun now rotates in approximately the same plane as its moon, although the sizes have not been adjusted for this. - Removed mass of the Lempo system as they are not derived from direct measurements.
Incorporating n3's update.
Finally updated Varda! - Mass ratio assumes spherical, equal density Varda and Ilmarë. - Varda's position angle uses Souami et al. (2022), but the inclination is roughly aligned with the correct orbit of Ilmarë.
This pull request primarily focuses on updating orbits of satellites of objects in dwarfplanets.ssc and outersys.ssc, though it also contains new sources for existing info, polishes, and so on.