Astronomy:HD 212771 b
| Discovery[1] | |
|---|---|
| Discovered by | Johnson et al. |
| Discovery site | Keck Observatory |
| Discovery date | 2010-03-17 |
| Doppler spectroscopy | |
| Orbital characteristics[2] | |
| 1.19±0.13 astronomical unit|AU | |
| Eccentricity | 0.076±0.051 |
| Orbital period | 380.7±1.4 d |
| |{{{apsis}}}|helion}} | 2454920±52 JD |
| 29±65 º | |
| Semi-amplitude | 50.0±5.8 m/s |
| Star | HD 212771 |
| Physical characteristics[2] | |
| Mass | ≥2.39±0.27 Jupiter mass |
HD 212771 b is an extrasolar planet orbiting the G-type star HD 212771 approximately 364 light years away[3] in the constellation Aquarius.[1]
Nomenclature
HD 212771 b is named Victoriapeak. The name was selected in the NameExoWorlds campaign by Hong Kong, during the 100th anniversary of the IAU. It is named after the Victoria Peak, the highest point on Hong Kong Island. The host star HD 212771 is named Lionrock, after the Lion Rock.[4][5]
Properties
Orbit
HD 212771 b's orbit period and distance are similar to Earth's, with the values being 380 days and 1.19 AU respectively. It orbits in a nearly perfect circular orbit compared to long period gas giants.
Characteristics
Due to the unknown orbital parameters, the planets true mass is not known, with a minimum of 2.39 times Jupiter's mass. HD 212771 b's radius is unknown, so NASA's Eyes on Exoplanets gives an estimate of 1.18 times the radius.[6]
See also
References
- ↑ 1.0 1.1 Johnson, John Asher et al. (2010). "Retired a Stars and Their Companions. IV. Seven Jovian Exoplanets from Keck Observatory". Publications of the Astronomical Society of the Pacific 122 (892): 701–711. doi:10.1086/653809. Bibcode: 2010PASP..122..701J.
- ↑ 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.
- ↑ Brown, A. G. A. et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics 595: A2. doi:10.1051/0004-6361/201629512. Bibcode: 2016A&A...595A...2G. https://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html.Gaia Data Release 1 catalog entry
- ↑ "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results.
- ↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/.
- ↑ "Eyes On Exoplanets – Exoplanet Exploration: Planets Beyond our Solar System". https://exoplanets.nasa.gov/eyes-on-exoplanets/#/planet/HD_212771_b/.
External links
- "HD 212771 b". Extrasolar Planets Encyclopaedia. 1995. https://exoplanet.eu/catalog/hd_212771_b--659/.
Coordinates: 
22h 27m 03s, −17° 15′ 49″
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| |||||||||||
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
| |||||||||||
 |  |
