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HD 8673

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.
o "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.
o "HD 8673 B". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&PlanetId=291. Retrieved December 21, 2007.

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