HD 212301
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Double star HD 212301 |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| AladinLite | |||||||||||||||||
| Constellation | Octant | ||||||||||||||||
| Right ascension | 22 h 27 m 31 s | ||||||||||||||||
| declination | -77 ° 43 ′ 05 ″ | ||||||||||||||||
| Apparent brightness | 7.8 likes | ||||||||||||||||
| Known exoplanets |
1 |
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| Astrometry | |||||||||||||||||
| Radial velocity | (+4.8 ± 0.2) km / s | ||||||||||||||||
| parallax | (18.20 ± 0.53) mas | ||||||||||||||||
| distance | (179 ± 5) ly ((54.9 ± 1.6) pc ) |
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| Proper movement : | |||||||||||||||||
| Rec. Share: | approx. +76 mas / a | ||||||||||||||||
| Dec. portion: | approx. −92 mas / a | ||||||||||||||||
| Individual data | |||||||||||||||||
| Names | A; B. | ||||||||||||||||
| Observation data: | |||||||||||||||||
| Apparent brightness | A. | 7.8 likes | |||||||||||||||
| B. | |||||||||||||||||
| Typing: | |||||||||||||||||
| Spectral class | A. | F8 V | |||||||||||||||
| B. | M3 V | ||||||||||||||||
| Physical Properties: | |||||||||||||||||
| Dimensions | A. | (1.27 ± 0.02) M ☉ | |||||||||||||||
| B. | about 0.35 M ☉ | ||||||||||||||||
| Other names and catalog entries |
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HD 212301 is a star system in the constellation Octans, about 180 light-years away . It consists of two stars and an exoplanet .
Main component of the system is a main sequence of spectral F8 with an apparent visual brightness may of 7.8, the 1.3 times the mass of the sun has. A red dwarf of the spectral class M3 was detected at an angular distance of 4 ", 4 (approx. 230 AU ) .
Exoplanet
The discovery of the exoplanet was announced on August 22, 2005 during the colloquium "The Tenth Anniversary of 51 Peg b" at the Observatoire de Haute-Provence . The exoplanet with the designation HD 212301 b (or HD 212301 Ab ) has 0.45 times the mass of Jupiter and orbits the main component in 2.457 days on an orbit with a major semi-axis of 0.036 AU (5.4 million km).
swell
- Mugrauer, M .; Neuhäuser, R .: The multiplicity of exoplanet host stars. New low-mass stellar companions of the exoplanet host stars HD 125612 and HD 212301 ; in: Astronomy and Astrophysics, Vol. 494, No. 1, p. 373ff. (2009), bibcode : 2009A & A ... 494..373M