Home
Artists
Search Recent Random
Posts
Search DMs Popular Hash Lookup Tags Random
Importer
Import FAQ
Register
Partychan Matrix ThePornDude
Home Artists Posts Import Register
Patreon importer is back online! Tell your friends ✅

Climate Explorations: Eccentricity (Patreon)

Published:
2023-12-06 22:09:47
Imported:
2024-07

Content

Actually had this all ready to go up yesterday and just forgot, and didn't want to wait another week. Given my post frequency I dunno why I really bother with the Tuesdays things anyway.

Files

Climate Explorations: Eccentricity

"True color" approximation for Earth with 0.6 eccentricity and no obliqu...

Comments

Thanasis Kinias

Interesting that the concentric-ring artifacts are showing up on the high-eccentricity runs. I’ve only ever seen that show up in tide-locked cases.

Thanasis Kinias

Have you played at all with eccentric orbits on tide-locked worlds? Something very weird happens with the substellar point getting dramatically displaced when both keplerian and synchronous are true. (The only physical explanation I have is that it has to do with libration, but I’d think that would only ‘smear out’ the substellar point, not displace it by many thousands of kilometres...)

Nikolai Lofving Hersfeldt
>>123934756

I haven't played much with tidal-locking, there's so many ways I could play around with it so I'm largely putting it off until I've hit all the obvious options for rapidly-rotating planets first. You do expect to see the substellar point shifting west and east throughout the year with high eccentricity; essentially, from the planet's perspective the star appears to circle once around it per year, and then with tidal-locking it rotates once around itself, following the star's motion. At high eccentricity, the speed of the planet's motion along its orbit varies throughout the year, and so the apparent motion of the star varies, but the rotation speed is constant; thus at different times of the year, the apparent motion of the star outpaces rotation or lags behind it, shifting the apparent position of the star in the sky. This should cause the substellar point to shift east and west in a regular pattern, returning to the "default" position (the longitude you entered in the script, or zero longitude by default) at the solstices. The official version of ExoPlaSim doesn't actually model this properly, just keeping the substellar point locked to one longitude in all cases, but a while back I posted a couple files here that can be added to fresh installs of version 3.2.4 before configuration to then give the correct behavior; you did comment on that post so I think that should be the version you're using? But be sure you are getting the substellar point moving west and east each orbit with eccentricity, if it's just stuck at one longitude that's not intended.