HD 212301 b

HD 212301 b

Extrasolar planet		List of extrasolar planets
Radial velocity of HD 212301 over time, caused by the orbit of HD 212301 b.
Parent star
Star		HD 212301
Constellation		Octans
Right ascension	(α)	22h 27m 30.9195s
Declination	(δ)	–77° 43′ 04.521″
Apparent magnitude	(mV)	7.77
Distance		171.93 ly (52.71 pc)
Spectral type		F8V
Orbital elements
Semimajor axis	(a)	0.0341 AU (5.10 Gm)
Periastron	(q)	0.0341 AU (5.10 Gm)
Apastron	(Q)	0.0341 AU (5.10 Gm)
Eccentricity	(e)	0
Orbital period	(P)	2.24572 ± 28 d
		(53.897 h)
Orbital speed	(υ)	166 km/s
Argument of periastron	(ω)	0°
Time of periastron	(T0)	2453549.195 ± 0.004 JD
Semi-amplitude	(K)	59.5 ± 0.7 m/s
Physical characteristics
Minimum mass	(m sin i)	0.396 MJ
Discovery information
Discovery date		August 22, 2005
Discoverer(s)		Lo Curto et al.
Detection method		Doppler spectroscopy
Discovery site		La Silla Observatory
Discovery status		Published

HD 212301 b is an extrasolar planet located approximately 172 light-years (53 parsecs) away in the constellation of Octans, orbiting the star HD 212301. It has an orbital period of 2.25 Earth days. The orbital distance is 0.0341 astronomical units or 5.10 gigameters.

On August 22, 2005, taking place in ESO La Silla Observatory in Chile, the planet was discovered by Lo Curto who used the HARPS spectrometer.

See also

• HD 213240 b

References

• Lo Curto et al. (2006). "The HARPS search for southern extra-solar planets. VII. A very hot Jupiter orbiting HD 212301". Astronomy and Astrophysics 451 (1): 345–350. Bibcode 2006A&A...451..345L. doi:10.1051/0004-6361:20054083. 

External links

• "Notes for planet HD 212301 b". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/planet.php?p1=HD+212301&p2=b. Retrieved 2008-08-29. 
• "HD b". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&PlanetId=. Retrieved 2008-08-29. 
• "HD 212301". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+212301. Retrieved 2008-08-29.