HD 108874 b

HD 108874 b is a gas giant announced in 2003.^[1] The orbit lies in the star's habitable zone.^[3] It is expected that any moons orbiting this planet are enriched in carbon, and are thus quite different from the silicate-rich bodies in the Solar System.^[4] The planet is possibly in a 4 : 1 orbital resonance with HD 108874 c.^[5]

HD 108874 b

Discovery
Discovered by	Butler et al.[1]
Discovery site	United States
Discovery date	June 30, 2003
Detection method	radial velocity
Orbital characteristics
Semi-major axis	1.053 ± 0.061 AU (157,500,000 ± 9,100,000 km)[2]
Eccentricity	0.128 ± 0.022[2]
Orbital period (sidereal)	394.48 ± 0.60[2] d
Time of periastron	2,454,045 ± 49[2]
Argument of periastron	219.4 ± 9.4[2]
Semi-amplitude	37.3 ± 1.1[2]
Star	HD 108874
Physical characteristics
Mass	>1.34 ± 0.11[2] MJ

Discovery

The jovian planet HD 108874 b was discovered by the US-based team led by Paul Butler, Geoffrey Marcy, Steven Vogt, and Debra Fischer. A total of 20 radial velocity observations, obtained at the W. M. Keck Observatory in Hawaii between 1999 and 2002, were used to make the discovery.^[1]

See also

• HD 28185 b