User:InTheAstronomy32/TOI-2109 b
TOI-2109b is an exoplanet orbiting the star F-type star TOI-2109. The planet is an ultra-short period planet, completing one orbit around its star every around 16 hours.[1] Due to the extreme proximity from its star, the planet is extremly hot, having a daytime temperature measured at 3631±69 K, which is hotter than the surface temperature of Betelgeuse,[a] and makes it the second-hottest known exoplanet.[1] The planet has a mass of 5.02 MJ and a radius of 1.35 RJ, which makes it a gas giant.[1] The planet was discovered in 2021, by the Transiting Exoplanet Survey Satellite. Its host star is TOI-2109, a F-type star that is about 1.45 times more massive than the Sun, 4.7 times more luminous and has an effective temperature of 6530 K, which is hotter than the Sun.[1] The star, and the planet are located around 860 light-years away, in the constellation Hercules.[1][note 1]
 | |
| Orbital characteristics | |
|---|---|
| 0.01791±0.00065 AU (2,680,000±97,240 km) | |
| Physical characteristics | |
Mean radius | 1.347±0.047 MJ |
| Mass | 5.02±0.75 MJ |
| Temperature | 3631±69 K (dayside) <2500 K (nightside) |
References[edit]
- ^ a b c d e Wong, Ian; Shporer, Avi; Zhou, George; Kitzmann, Daniel; Komacek, Thaddeus D.; Tan, Xianyu; Tronsgaard, René; Buchhave, Lars A.; Vissapragada, Shreyas; Greklek-McKeon, Michael; Rodriguez, Joseph E.; Ahlers, John P.; Quinn, Samuel N.; Furlan, Elise; Howell, Steve B. (2021-11). "TOI-2109: An Ultrahot Gas Giant on a 16 hr Orbit". The Astronomical Journal. 162 (6): 256. doi:10.3847/1538-3881/ac26bd. ISSN 1538-3881.
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