HD 114783

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**HD 114783**
Observation data Epoch 2000
Constellation (pronunciation)	Virgo
Right ascension	13^h 12^m 43.79^s
Declination	-2° 15' 54.14"
Apparent magnitude (V)	7.57
Distance	66.60 ly (20.43 pc)
Spectral type	K0
Other designations
GJ 3769, BD-01°2784, HIP 64457, SAO 139218

HD 114783 is an 8th magnitude star in the constellation of Virgo. As an orange dwarf it is somewhat dimmer and cooler than our Sun. The spectral type of the star is K0 V. The star is not visible with the unaided eye, but is easy target for binoculars.

In 2001, the California and Carnegie Planet Search team found an extrasolar planet orbiting the star. The discovery was made with the Keck Telescope.

[edit] HD 114783 b

**HD 114783 b**
Orbital elements
Extrasolar planet		List of extrasolar planets
Semimajor axis	(a)	1.169±0.068 AU
Eccentricity	(e)	0.085±0.033
Orbital period	(P)	496.9±2.3 d
Angular distance	(θ)	55 mas
Longitude of periastron	(ω)	93±25°
Time of periastron	(T₀)	2,450,840 ±37 JD
Semi-amplitude	(K)	30.2±0.75 m/s
Physical characteristics
Mass	(m)	>1.034±0.089 M_J
Radius	(r)	>1.0 (Estimated) R_J
Discovery information
Discovery date		2001
Discoverer(s)		Vogt, Butler, Marcy et al.
Detection method		Radial velocity
Discovery status		Published

The planet, designated as HD 114783 b, has a minimum mass almost exactly that of Jupiter. However, since the true mass is not known, it may be more massive, but not likely much. It orbits the star 20% further than Earth orbits the Sun. The orbit is quite circular. Because the star is less luminous and warm than the Sun, the planet is considerably colder than the Earth.