HD 37124

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HD 37124

Observation data Epoch J2000.0
Constellation (pronunciation)	Taurus
Right ascension	05h 37m 02.4864s
Declination	+20° 43' 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, G 100-27, SAO 77323, AGK3R 5002

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.

Contents 1 Planets 1.1 HD 37124 b 1.2 HD 37124 c 1.3 HD 37124 d 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:	?°
Angular distance θ:	16.061 mas
Longitude of periastron ω:	140.5°
Time of periastron τ:	2,450,000.11 JD
Semi-amplitude K:	27.5 m/s
Physical characteristics
Mass:	>0.61 MJ
Radius:	? RJ
Density:	? kg/m³
Gravity:	? g
Temperature:	? K
Discovery
Discovery date:	Nov 14, 1999
Discovery site:
Detection method(s):	Radial velocity
Discoverer(s):	Marcy et al.
Other catalogue

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 with a radius slightly larger or smaller than that of 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:	?°
Angular distance θ:	49.698 mas
Longitude of periastron ω:	314.3°
Time of periastron τ:	2,449,409.4 JD
Semi-amplitude K:	15.4 m/s
Physical characteristics
Mass:	>0.6 MJ
Radius:	? RJ
Density:	? kg/m³
Gravity:	? g
Temperature:	? K
Discovery
Discovery date:	Jun 13, 2002
Discovery site:
Detection method(s):	Radial velocity
Discoverer(s):	Marcy et al.
Other catalogue

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:	?°
Angular distance θ:	96.667 mas
Longitude of periastron ω:	266°
Time of periastron τ:	2,449,606 JD
Semi-amplitude K:	12.2 m/s
Physical characteristics
Mass:	>0.66 MJ
Radius:	? RJ
Density:	? kg/m³
Gravity:	? g
Temperature:	? K
Discovery
Discovery date:	Jun 24, 2005
Discovery site:
Detection method(s):	Radial velocity
Discoverer(s):	Marcy et al.
Other catalogue

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.

[edit] See also

• List of stars with confirmed extrasolar planets
• HD 74156

[edit] References

• Vogt et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal 536 (2): 902 – 914. doi:10.1086/308981. 
• Butler et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal 582 (1): 455 – 466. doi:10.1086/344570. 
• Vogt et al. (2005). "Five New Multicomponent Planetary Systems". The Astrophysical Journal 632 (1): 638 – 658. doi:10.1086/432901. 

[edit] External links

• HD 37124. SIMBAD. Retrieved on 2006-04-14.
• Notes for star HD 37124. The Extrasolar Planets Encyclopaedia. Retrieved on 2006-04-14.