HD 65216 b

HD 65216 b

Exoplanet		List of exoplanets
Parent star
Star		HD 65216
Constellation		Carina
Right ascension	(α)	07h 53m 41.3223s
Declination	(δ)	–63° 38′ 50.363″
Distance		116.0 ly (35.59 pc)
Spectral type		G5V
Orbital elements
Semi-major axis	(a)	1.374±0.082 AU
Periastron	(q)	0.805 AU
Apastron	(Q)	1.943 AU
Eccentricity	(e)	0.41±0.06
Orbital period	(P)	613±11 d (1.68 y)
Orbital speed	(υ)	24.44 km/s
Argument of periastron	(ω)	198±6°
Time of periastron	(T0)	2,450,762±25 JD
Semi-amplitude	(K)	33.7±1.1 m/s
Physical characteristics
Minimum mass	(m sin i)	1.22±0.19 MJ
Discovery information
Discovery date		30 June 2003
Discoverer(s)		Mayor, Urdy, Naef et al.
Discovery method		Radial velocity
Discovery site		United States
Discovery status		Published

HD 65216 b is an extrasolar planet located approximately 116 light-years away in the constellation of Carina, orbiting the star HD 65216. This planet was discovered by the Geneva Extrasolar Planet Search Team in 2003. Like most planet candidates so far, it was detected with the radial velocity method.

The planet has a minimum mass about 20% more than Jupiter. Since the discovery method gives only the minimum mass, its true mass is probably slightly greater. The planet orbits the star in a very eccentric orbit. The mean distance from the star is slightly less than that of Mars from the Sun, but at periastron the planet is a fifth closer to the star than Earth from the Sun and at apoastron it is over twice as far.