Info for exoplanet "Pallene"

Scientific (actual) data Planet GJ 876 c Planet status Confirmed Mass sini 0.698 Orbital period 30.126 Semi major axis 0.134 Orbit eccentricity 0.25 Angular distance 0.027572 Discovered 2000 Updated 2022-07-25 Omega 51.6 K 88.34 Publication Published in a refereed paper Detection type Radial Velocity Mass detection type Radial Velocity Molecules CH4, H, OH Star name GJ 876 Right ascension 343.3° Declination -14.25° Mag v 10.17 Star distance 4.7 Star metallicity 0.05 Star mass 0.334 Star radius 0.36 Star sp type M4 V Star age 2.5 Star temperature 3350 Wikipedia article GJ 876 c Back

Fictional info (?) Suggested name Pallene Planet type Cold planet Pallene is the fourth planet from GJ 876 and the second-smallest planet in its solar system. Pallene has been known to astronomers since the medieval. This planet is named after the deity Pallene, the creator of good fortune. When viewed from Phoan, this proximity to GJ 876 means the planet can only be seen near the western or eastern horizon during the early evening or early morning. As seen from GJ 876, in a frame of reference that rotates with the orbital motion, it appears to rotate only once every two years. An observer on Pallene would therefore see only one winter every three years. Pallene's surface appears quite bruised and is similar in appearance to the Moon's, indicating that it has been geologically inactive for billions of years. It has the densest atmosphere of any cold planets, consisting primarily of H,. The OH has probably photodissociated, and the free H, has been swept into interplanetary space by the solar wind because of the lack of a planetary magnetic field. The volume of water detected has been estimated to be equivalent to the volume of water in Earth's oceans. Pallene is primarily composed of H, with a significant part of its mass being CH4,, though CH4, comprises only about a small amount of the number of molecules. Surrounding Pallene is a irregular planetary ring system and a powerful magnetosphere. Its north and south poles, therefore, lie where most other planets have their equators. Atmosphere H, 62% CH4, 37% OH 0.064% Atmospheric pressure 80 bar No known satellites Google search for Pallene