HD 52265

From Wikipedia, the free encyclopedia

**HD 52265**
Observation data Equinox 2000
Constellation	Monoceros
Right ascension	7^h 0^m 18.04^s
Declination	-5° 22' 1.78"
Apparent magnitude (V)	6.301
Distance	91.50 ly (28.07 pc)
Spectral type	G0V
Other designations
BD-05°1910, HR 2622, HIP 33719

HD 52265 is a 6th magnitude star in the constellation of Monoceros. Like our Sun, it is a yellow dwarf. However, it is 18% more massive and almost twice as luminous than our Sun. Age of the star is 4,000 million years.

In 2000 the California and Carnegie Planet Search team announced the discovery of an extrasolar planet orbiting the star. Like most planet discoveries so far, it was detected by using the radial velocity method.

[edit] HD 52265 b

**HD 52265 b**
Orbital elements
Extrasolar planet		Lists of extrasolar planets
Semimajor axis	(a)	0.504±0.029 AU
Eccentricity	(e)	0.325±0.065
Orbital period	(P)	119.290±0.086 d
Inclination	(i)	?°
Longitude of periastron	(ω)	243±15°
Time of periastron	(τ)	2,450,833.7±4.2 JD
Physical characteristics
Mass	(m)	>1.09±0.11 M_J
Radius	(r)	? R_J
Density	(ρ)	? kg/m³
Temperature	(T)	? K
Discovery information
Discovery date		2000
Discoverer(s)		Butler, Vogt, Marcy et al.
Detection method		Radial velocity
Discovery status		Published

The planet, classified as HD 52265 b, is a gas giant with a minimum mass slightly more than that of Jupiter. Mean distance between the planet and the star is half that of Earth from the Sun. The orbit is eccentric, at periastron the planet slightly closer the star than Mercury is from the Sun, and at apoastron it is twice as far.