Exoplanet Discoveries and Updates

[stevebowers]

Lalande 21185, with a planet named Hormizd
https://orionsarm.com/eg-article/46789378a3d4e

[AstroChara]

Lalande 21185, with a planet named Hormizd
https://orionsarm.com/eg-article/46789378a3d4e

I suggest we merge Lalande 21185 page with New L4. The planets in this system could be named after asteroids in Sol-Jupiter L4. As for Hormizd, let's use that elsewhere. We have no shortage of nearby red dwarf planets, anyways

[stevebowers]

I'll merge the articles, but Hormizd can stay. It is based on a real planet
http://exoplanet.eu/catalog/lalande_21185_b/
I expect that 'New L4' is a name for a swarm of asteroid settlements in the Lalande/Hormizd L4 position.

[AstroChara]

I'll merge the articles, but Hormizd can stay. It is based on a real planet
http://exoplanet.eu/catalog/lalande_21185_b/

Yeah, but the name doesn't really fit the system name. This is a great chance to name something non-Earth as well (Jovian in this case). I mentioned about the proposal before in the Discord DM...

I propose we name this planet Achilles.

[stevebowers]

Okay, that seems reasonable. The New L4 designation seems to apply to a group of asteroids at the L4 location, so we can call those New Paris, New Hector and so on.

[stevebowers]

I've merged the New L4 article with the Lalande 21185 article now, and added a new image.

[Drashner1]

Nice image! One of your best space colonies yet

Todd

[stevebowers]

Thanks! It is a standard O'Neill colony: I simply made a model of the structure as O'Neill described it. Normally I reinterpret them somewhat, but this one is pretty unembellished.

[AstroChara]

The giant planet mentioned to be orbiting around VB 10 / Gliese 752 B doesn't appear to exist. There, however, is a planet around its companion, Gliese 752 A. This system is not on my main focus right now, but I think it's a good idea to inform.

Gliese 752 Ab
Semi-major axis: 0.3357 AU
Orbital period: 105.90 days
Eccentricity: 0.16
Minimum mass: 12.2 Earths
Paper submitted 3 Aug 2018

Notably, this planet's eccentricity brings it in and out of the star's habitable zone. I suggest we don't put any terraformable moon here though.

[stevebowers]

The Perpetua projects can be relocated to Gl752Ab. The important thing is having the potential resources to build infrastructure.