HD 88133

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**HD 88133**
Observation data Epoch 2000
Constellation (pronunciation)	Leo
Right ascension	10^h 10^m 7.68^s
Declination	+18° 11' 12.74"
Apparent magnitude (V)	8.06
Distance	242.7 ly (74.46 pc)
Spectral type	G5 IV
Other designations
BD+18°2326, HIP 49813

HD 88133 is an 8th magnitude star in the constellation of Leo. It is classified as a yellow subgiant star (spectral type G5 IV). It is slightly more massive than our Sun, cooler and more luminous. As a subgiant, it has left the main sequence and started to evolve towards red gianthood. Located at a distance of 240 light years from Earth it is not in our immediate neighbourhood and thus not visible to the unaided eye. With a small telescope it should be easily visible.

In 2004 a planet was found to orbit the star.

[edit] HD 88133 b

**HD 88133 b**
Orbital elements
Extrasolar planet		List of extrasolar planets
Semimajor axis	(a)	0.0472±0.0027 AU
Eccentricity	(e)	0.133±0.072
Orbital period	(P)	3.41587±0.00059 d
Angular distance	(θ)	0.631 mas
Longitude of periastron	(ω)	349°
Time of periastron	(T₀)	2,453,016.31±0.32 JD
Semi-amplitude	(K)	36.1±3.0 m/s
Physical characteristics
Mass	(m)	>0.299±0.033 M_J
Discovery information
Discovery date		2004
Discoverer(s)		Fischer, Laughlin, Butler et al.
Detection method		Radial velocity
Discovery status		Published

HD 88133 b is an extrasolar planet orbiting the star HD 88133. It is probably less massive than Jupiter and even Saturn. It orbits the star in a very tight orbit, completing one revolution around the star in every three and half days or so. Despite the relatively large radius of the star (about 2 times Solar), no transits have been detected.