HD 37124

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**HD 37124**
Observation data Equinox J2000.0
Constellation	Taurus
Right ascension	05^h 37^m 02.4864^s
Declination	+20° 64' 50.836"
Apparent magnitude (V)	7.68
Distance	108.3 ly (33.2 pc)
Spectral type	G4 IV-V
Other designations
Gl 209, BD+20°1018, HIP 26381

HD 37124 is a yellow dwarf star (spectral type G4 IV-V) in the constellation of Taurus. It is 108 light years from Earth and has three extrasolar planets.

1 Planets
2 See also
3 References
4 External links

[edit] Planets

[edit] HD 37124 b

**HD 37124 b**
Orbital elements

Semi-major axis a:	0.53 AU
Eccentricity e:	0.055
Orbital period P:	154.46 ± 0.369 d
Inclination i:	?°
Longitude of periastron ω:	140.5°
Time of periastron τ:	2,450,000.11 JD
Physical characteristics
Mass:	>0.61 M_J
Radius:	? R_J
Density:	? kg/m³
Temperature:	? K
Discovery
Discovery date:	1999
Detection method(s):	Radial velocity
Discoverer(s):	Marcy et al.

HD 37124 b is an extrasolar planet discovered in 2000 which orbits within the inside edge of the star's habitable zone, and would receive insolation similar to that of Venus. Based on its mass, it is most likely that this planet is a gas giant like Jupiter.

[edit] HD 37124 c

**HD 37124 c**
Orbital elements

Semi-major axis a:	1.64 AU
Eccentricity e:	0.14
Orbital period P:	843.6 d
Inclination i:	?°
Longitude of periastron ω:	314.3°
Time of periastron τ:	2,449,409.4 JD
Physical characteristics
Mass:	>0.6 M_J
Radius:	? R_J
Density:	? kg/m³
Temperature:	? K
Discovery
Discovery date:	June 13, 2002
Detection method(s):	Radial velocity
Discoverer(s):	Marcy et al.

HD 37124 c is an extrasolar planet discovered in 2002 which orbits just beyond the outer edge of its star's habitable zone, and would receive insolation similar to that of Mars. This planet is most likely a gas giant, based on its mass.

[edit] HD 37124 d

**HD 37124 d**
Orbital elements

Semi-major axis a:	3.19 AU
Eccentricity e:	0.2
Orbital period P:	2295 d
Inclination i:	?°
Longitude of periastron ω:	266°
Time of periastron τ:	2,449,606 JD
Physical characteristics
Mass:	>0.66 M_J
Radius:	? R_J
Density:	? kg/m³
Temperature:	? K
Discovery
Discovery date:	2005
Detection method(s):	Radial velocity
Discoverer(s):	Marcy et al.

HD 37124 d is an extrasolar planet discovered in 2005 in a long-period orbit. Based on its mass, it is considered to be a gas giant. An alternative solution to the radial velocities gives a period of 29.92 days and a minimum mass 17% that of Jupiter.