Astronomy:HD 38801 b
| Discovery[1] | |
|---|---|
| Discovered by | Harakawa et al. |
| Discovery site | Subaru Telescope and Keck Observatory |
| Discovery date | 2010 |
| Doppler spectroscopy | |
| Orbital characteristics[2] | |
| 1.66±0.11 astronomical unit|AU | |
| Eccentricity | 0.059±0.026 |
| Orbital period | 686.8±1.4 d |
| |{{{apsis}}}|helion}} | 2453849±27 JD |
| 296±14 º | |
| Semi-amplitude | 196.3±3.8 m/s |
| Star | HD 38801 |
| Physical characteristics[2] | |
| Mass | ≥10.13±23 Jupiter mass |
HD 38801 b is an extrasolar, gas giant planet located in the constellation of Orion[3] whose discovery was announced in 2009 and was made using the radial velocity method.[4] The object, with a mass roughly 12 times that of Jupiter,[4] is located 324 light years (99.4 parsecs) from Earth[5][6] orbiting 1.65 astronomical units from its G-type star, HD 38801.[4][7] HD 38801 b, besides being the only planet in its system[5] also lies within the inner habitable zone[6] and takes around 1.9 years, or 693.5 days to complete a full orbit.[4]
Hd 38801 b is characterized by its uniquely low eccentricity values, or having a near circular orbit. As a super massive planet with an orbital period of hundreds of days, this occurrence is quite uncommon.[1]
References
- ↑ 1.0 1.1 Harakawa, Hiroki et al. (2010). "Detection of a Low-eccentricity and Super-massive Planet to the Subgiant HD 38801". The Astrophysical Journal 715 (1): 550–553. doi:10.1088/0004-637X/715/1/550. Bibcode: 2010ApJ...715..550H.
- ↑ 2.0 2.1 Luhn, Jacob K. et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal 157 (4): 149. doi:10.3847/1538-3881/aaf5d0. Bibcode: 2019AJ....157..149L.
- ↑ "Exoplorer: Hd-38801-b". http://exoplorer.org/en/exoplanets/hd-38801-b.
- ↑ 4.0 4.1 4.2 4.3 "HD 38801 b – New World Atlas – Exoplanet Exploration: Planets Beyond our Solar System". https://exoplanets.nasa.gov/newworldsatlas/5633/hd-38801-b/.
- ↑ 5.0 5.1 "Open Exoplanet Catalogue - HD 38801 B". http://www.openexoplanetcatalogue.com/planet/HD%2038801%20b/.
- ↑ 6.0 6.1 "HD 38801". http://www.exoplanetkyoto.org/exohtml/HD_38801.html.
- ↑ "HD 38801 b". https://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=HD+38801+b&type=PLANET+HOST.
 |  |
