HD 108874

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HD 108874

Observation data Epoch 2000
Constellation	Coma Berenices
Right ascension	12h 30m 26.8829s
Declination	+22° 52' 47.383"
Apparent magnitude (V)	8.76
Distance	223.4 ly (68.5 pc)
Spectral type	G5 V
Other designations
BD+23°2466,HIP 61028

HD 108874 is a yellow dwarf star (spectral type G5 V) in the constellation of Coma Berenices. It is 223 light years from Earth and has two extrasolar planets that are possibly in a 4:1 orbital resonance.

Contents 1 Planets 1.1 HD 108874 b 1.2 HD 108874 c 2 References

[edit] Planets

[edit] HD 108874 b

HD 108874 b

Orbital elements
Semi-major axis	(a)	1.051 ± 0.02 AU
Eccentricity	(e)	0.07 ± 0.04
Orbital period	(P)	395.4 ± 2.5 d
Inclination	(i)	?°
Longitude of periastron	(ω)	248.4 ± 36°
Time of periastron	(τ)	2,450,131.5 ± 60 JD
Physical characteristics
Mass		>1.36 ± 0.13 MJ
Radius		? RJ
Density		? kg/m³
Temperature		? K
Discovery
Discovery date		2003
Detection method(s)
Discoverer(s)		Butler, Marcy, Vogt, Fischer et al.

HD 108874 b is a gas giant discovered in 2003 that orbits in the star's habitable zone. This means that its moons may have the potential to bear life provided their atmospheric conditions are right.

[edit] HD 108874 c

HD 108874 c

Orbital elements
Semi-major axis	(a)	2.68 ± 0.25 AU
Eccentricity	(e)	0.25 ± 0.07
Orbital period	(P)	1605.8 ± 88 d
Inclination	(i)	?°
Longitude of periastron	(ω)	17.3 ± 23°
Time of periastron	(τ)	2,449,584.8 ± 180 JD
Physical characteristics
Mass		>1.018 ± 0.3 MJ
Radius		? RJ
Density		? kg/m³
Temperature		? K
Discovery
Discovery date		2005
Detection method(s)
Discoverer(s)		Vogt, Butler Marcy, Fischer et al.

HD 108874 c is a gas giant discovered in 2005 which orbits beyond the star's habitable zone.

[edit] References

• Butler et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal 582: 455-466.
• Vogt et al. (2005). "Five New Multicomponent Planetary Systems". The Astrophysical Journal 632: 638 – 658.