HD 8673
Appearance
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Andromeda |
Right ascension | 01h 26m 08.786s[1] |
Declination | +34° 34′ 46.92″[1] |
Apparent magnitude (V) | 6.31 |
Characteristics | |
Spectral type | F7V |
U−B color index | 0.01 |
B−V color index | 0.47 |
Astrometry | |
Radial velocity (Rv) | 16.9 ± 2 km/s |
Proper motion (μ) | RA: 237.19 ± 0.33[1] mas/yr Dec.: -84.64 ± 0.25[1] mas/yr |
Parallax (π) | 27.73 ± 0.40 mas[1] |
Distance | 118 ± 2 ly (36.1 ± 0.5 pc) |
Absolute magnitude (MV) | 6.78 |
Details | |
Mass | 1.3 M☉ |
Radius | 1.07 R☉ |
Luminosity | 4.588 L☉ |
Temperature | 6000 – 7500 K |
Rotation | 0.004641 years |
Age | 1.95 × 109 years |
Other designations | |
Database references | |
SIMBAD | data |
HD 8673 is an F-type main sequence star approximately 118 light-years away[1] in the constellation of Andromeda. It has an apparent magnitude and absolute magnitude of 6.31 and 3.40 respectively. A sub-stellar companion was detected in 2005, it could either be a exoplanet or a brown dwarf.
Possible planetary system
An orbiting sub-stellar companion with a minimum mass 14 times that of Jupiter in a high-eccentricity orbit was discovered in 2005 and confirmed in 2010. This 1600 day object orbits at 3 AU away from its parent star.[2]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ≥14.2 ± 1.6 MJ | 3.02 ± 0.15 | 1634 ± 17 | 0.723 ± 0.016 | — | — |
References
- ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- ^ a b Hartmann, Michael; et al. (2010). "A Sub-stellar Companion around the F7 V Star HD 8673". The Astrophysical Journal. 717 (1): 348–356. Bibcode:2010ApJ...717..348H. doi:10.1088/0004-637X/717/1/348.
- Hatzes; et al. (2005). "The first extrasolar planets from the TOPS program: a superplanet around a massive evolved star and an F7 star" (pdf). Geophysical Resource Abstract. 7. Retrieved December 21, 2007.
External links
- "Notes for star HD 8673". The Extrasolar Planets Encyclopaedia. Retrieved December 21, 2007.
- "Notes for planet HD 8673 b". The Extrasolar Planets Encyclopaedia. Retrieved December 21, 2007.