HD 212301 b

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.^[1]

HD 212301 b

Discovery
Discovered by	Lo Curto et al.
Discovery site	La Silla Observatory
Discovery date	August 22, 2005
Detection method	Doppler spectroscopy
Orbital characteristics
Apastron	0.0341 AU (5,100,000 km)
Periastron	0.0341 AU (5,100,000 km)
Semi-major axis	0.0341 AU (5,100,000 km)
Eccentricity	0
Orbital period (sidereal)	2.24572 ± 28 d 53.897 h
Average orbital speed	166
Time of periastron	2453549.195 ± 0.004
Argument of periastron	0
Semi-amplitude	59.5 ± 0.7
Star	HD 212301

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