Misplaced Pages

HD 212771 b

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Extrasolar planet orbiting the star HD 212771 in the constellation Aquarius "Victoriapeak" redirects here. Not to be confused with Victoria Peak.
HD 212771 b / Victoriapeak
Discovery
Discovered byJohnson et al.
Discovery siteKeck Observatory
Discovery date2010-03-17
Detection methodDoppler spectroscopy
Orbital characteristics
Semi-major axis1.19±0.13 AU
Eccentricity0.076±0.051
Orbital period (sidereal)380.7±1.4 d
Time of perihelion2454920±52 JD
Argument of perihelion29±65 º
Semi-amplitude50.0±5.8 m/s
StarHD 212771
Physical characteristics
Mass≥2.39±0.27 MJ

HD 212771 b is an extrasolar planet orbiting the G-type star HD 212771 approximately 364 light years away in the constellation Aquarius.

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.

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

Size comparison
Jupiter HD 212771 / Victoriapeak
Jupiter Exoplanet

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.

See also

References

  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. arXiv:1003.3445. Bibcode:2010PASP..122..701J. doi:10.1086/653809.
  2. ^ 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. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.
  3. Brown, A. G. A.; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
  4. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  5. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  6. "Eyes On Exoplanets – Exoplanet Exploration: Planets Beyond our Solar System". exoplanets.nasa.gov. Retrieved 2021-06-06.

External links


Constellation of Aquarius
Stars
Bayer
Flamsteed
Variable
HR
HD
Other
Exoplanets
Star clusters
Nebulae
Galaxies
NGC
Other
Galaxy clusters
Astronomical events
Category


Stub icon

This extrasolar-planet-related article is a stub. You can help Misplaced Pages by expanding it.

Categories: