HD 76700 b

HD 76700 b is an exoplanet orbiting the G-type main sequence star HD 76700, approximately 198 light years away in the southern constellation Volans. The planet was discovered in 2002, and was announced in 2003.

HD 76700 b

An artist's impression of HD 76700 b orbiting its host star.
Discovery[1]
Discovered by	Tinney, Butler, Marcy et al.
Discovery site	Anglo-Australian Telescope
Discovery date	July 5, 2002
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	0.0511 ± 0.0030 AU (7,640,000 ± 450,000 km)[2]
Eccentricity	0.10±0.08[3]
Orbital period (sidereal)	3.97097±0.00023 d[3]
Time of perihelion	2451213.32±0.67 JD[2]
Argument of perihelion	30°[2]
Semi-amplitude	27.6±1.7
Star	HD 76700
Physical characteristics
Mean radius	0.99 RJ
Mass	0.21±0.03 MJ[3]
Surface gravity	5.82 m/s2
Temperature	1316+85 −252 K

Discovery

In 2002, a group of scientists detected planets around multiple stars, along with HD 76700. Unlike the other planets, HD 76700 b has a short and circular orbit; however, according to the newest data, the planet's orbit may be slightly eccentric.

Properties

Due to the planet's high mass, it is a gas giant similar to Saturn. HD 76700 b was detected indirectly, so properties such as its radius, inclination, and temperature is unknown. HD 76700 b has a short four day orbit around its host due to it being eight times closer than Mercury is to the Sun.