HD 156846
Coordinates: 
17h 20m 34.3100s, −19° 20′ 01.486″
17h 20m 34.3100s, −19° 20′ 01.486″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 20m 34.31093s[1] |
| Declination | −19° 20′ 01.4944″[1] |
| Apparent magnitude (V) | 6.506[2] + 14.10[3] |
| Characteristics | |
| Spectral type | G1V[4] + M4V[5] |
| B−V color index | 0.557[2] |
| Absolute magnitude (MV) | 3.055[2] |
| Details Gyr | |
| B | |
| Mass | 0.59[5] M☉ |
| Database references | |
| SIMBAD | data |
HD 156846 is a
light years from the Sun based on parallax.[1] It is drifting closer with a radial velocity of −68.5 km/s, and is predicted to come to within 85.0 light-years in about 476,000 years.[6]
The primary, component A, is a
The magnitude 14.4 secondary companion, component B, was discovered by the American astronomer
projected separation of 250 AU. This is a red dwarf with a class of M4V and has an estimated 59% of the Sun's mass.[5]
Planetary system
On 26 October 2007, a planet
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥10.57±0.29 MJ | 1.096±0.021 | 359.5546±0.0071 | 0.84785±0.00050 | — | — |
See also
- HD 4113
- List of extrasolar planets
References
- ^ .
- ^ S2CID 13001033. 28.
- ^ doi:10.1086/323920.
- ^ Bibcode:1988mcts.book.....H.
- ^ S2CID 84180618.
- ^ S2CID 119257644.
- ^ "HD 156846". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-13.
- ISBN 0-933346-84-0.
- S2CID 11350536.
