HD 23127

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**HD 23127**
Observation data Epoch J2000.0
Constellation (pronunciation)	Reticulum
Right ascension	03^h 39^m 23.64^s
Declination	-60° 4' 40.23
Apparent magnitude (V)	+8.58
Distance	290.70 ly (89.13 pc)
Spectral type	G2V
Other designations
CD -60° 762, HIP 17054, SAO 248860.

HD 23127 is a star in the Reticulum constellation. It is a hydrogen-fusing sun-like star with spectrum G2V. At the distance of 290.7 ly, it is not visible to the naked eye, but it is visible with a good pair of binoculars.

The star is more massive than our Sun at 1.13 solar mass. The star is also more metal-rich, meaning it contains more metals [Fe/H]. The age of the star is older than the local star at 7 billion years old, more than half-way through its life.

On Friday, February 9, 2007, a Jovian planet was found orbiting this solar-type star.

[edit] HD 23127 b

**HD 23127 b**
Orbital elements
Extrasolar planet		List of extrasolar planets
Semimajor axis	(a)	2.4 ± 0.3 AU
Eccentricity	(e)	0.44 ± 0.07
Orbital period	(P)	1214 ± 9 d
Angular distance	(θ)	26.936 mas
Longitude of periastron	(ω)	190 ± 6°
Time of periastron	(T₀)	2,400,229 ± 19 JD
Semi-amplitude	(K)	27.5 ± 1 m/s
Physical characteristics
Mass	(m)	>1.5 ± 0.2 M_J
Discovery information
Discovery date		February 9, 2007
Discoverer(s)		O'Toole et al.
Detection method		radial velocity
Discovery status		published

HD 23127 b is a jovian extrasolar planet orbiting the star HD 23127 at the distance of 2.4 AU, taking 3.32 years to orbit. The orbit is very eccentric, a so-called "eccentric Jupiter". At periastron, the distance is 1.34 AU, putting in its outer edge of the habitable zone, and at apastron, the distance is 2.79 AU.

The mass is at least 1.5 times Jupiter. Only the minimum mass is known because the inclination is not known.