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HD 8673 Observation data Epoch J2000.0      Equinox J2000.0 Constellation Andromeda Right ascension 01h 26m 08.7849s Declination +34° 34′ 46.921″ 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: 235.58 ± 0.66 mas/yr Dec.: -84.99 ± 0.42 mas/yr Parallax (π) 26.14 ± 0.79 mas Distance 125 ± 4 ly (38 ± 1 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 2MASS J01260875+3434471, BD+33°228, GC 1726, HD 8673, HIP 6702, HR 410, IRAS 01232+3418 PPM 66283, SAO 54695, TYC 2300-1642-1 Database references SIMBAD data HD 8673 is an F-type main sequence star approximately 125 light-years away in the constellation of Andromeda. It has an apparent magnitude and absolute magnitude of 6.31 and 3.40 respectively. In its orbit, there is debate about the celestial object as to whether be an exoplanet or a brown dwarf. Possible planetary system An unconfirmed celestial object is thought to be orbiting around HD 8673. The possible mass ranges from 10 to 18 Jupiter mass. This 639-day object orbits at 236 Gm (1.58 AU away from its parent star HD 8673. This planet or brown dwarf was discovered in Texas in 2005 by Hatzes, who was the discoverer of Epsilon Eridani b. The HD 8673 system Companion (in order from star) Mass Semimajor axis (AU) Orbital period (days) Eccentricity b (unconfirmed) >14 ± 4 MJ 1.58 639  ? References Hatzes et al. (2005). "The first extrasolar planets from the TOPS program: a superplanet around a massive evolved star and an F7 star.". Geophysical Resource Abstract 7. http://www.cosis.net/abstracts/EGU05/06592/EGU05-J-06592.pdf. Retrieved December 21, 2007.  External links "Notes for star HD 8673". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+8673. Retrieved December 21, 2007.  "Notes for planet HD 8673 b". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/planet.php?p1=HD+8673&p2=b. Retrieved December 21, 2007.  "HD 8673". Extrasolar Visions. http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=250. Retrieved December 21, 2007.  "HD 8673 B". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&PlanetId=291. Retrieved December 21, 2007.  This main sequence star-related article is a stub. You can help Wikipedia by expanding it. v • d • e This extrasolar planet related article is a stub. You can help Wikipedia by expanding it. v • d • e