HD 70642 b: Wikis

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Categories: Extrasolar planets > Puppis constellation > Exoplanets discovered in 2003 > Gas giant planets > Exoplanets detected by radial velocity

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Updated live from Wikipedia, last check: May 24, 2013 21:32 UTC (54 seconds ago)

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**HD 70642 b**
Parent star
Extrasolar planet		List of extrasolar planets
Star		HD 70642
Constellation		Puppis
Right ascension	(α)	08^h 21^m 28.1361^s
Declination	(δ)	−39° 42′ 19.474″
Apparent magnitude	(m_V)	7.18
Distance		93.8 ly (28.76 pc)
Spectral type		G5V
Orbital elements
Semimajor axis	(a)	3.232 AU (483.5 Gm)
		112.4 mas
Periastron	(q)	3.123 AU (467.2 Gm)
Apastron	(Q)	3.341 AU (499.8 Gm)
Eccentricity	(e)	0.034 ± 0.043
Orbital period	(P)	2068 ± 39 d (5.66 y)
Orbital speed	(υ)	17.06 km/s
Argument of periastron	(ω)	205°
Time of periastron	(T₀)	2,451,350 ± 380 JD
Semi-amplitude	(K)	30.4 ± 1.3 m/s
Physical characteristics
Minimum mass	(m sin i)	1.97 ± 0.06 M_J
Discovery information
Discovery date		July 3, 2003
Discoverer(s)		Carter et al.
Detection method		Radial velocity (Anglo-Australian Telescope)
Discovery site		Anglo-Australian Observatory
Discovery status		Published
Other designations
Gliese 304 b, HIP 40952 b
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data

HD 70642 b (also known as HIP 40952 b and Gliese 304 b) is an extrasolar planet orbiting the star HD 70642 at 3.23 AU distance and takes 5.66 years to revolve. This planet is a “Jupiter-twin” because it is very similar to Jupiter in our Solar System, though only three-fifths the distance, twice as massive, and two-thirds as eccentric. This planet may have systems of moons like Jupiter. This planet was discovered on July 3, 2003.