HD 212301
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