Gliese 674 b

Gliese 674 b

Exoplanet		List of exoplanets
300px Radial velocity of GJ 674 over time, caused by the orbit of GJ 674 b.
Parent star
Star		Gliese 674
Constellation		Ara
Right ascension	(α)	17h 28m 39.9463s
Declination	(δ)	–46° 53′ 42.685″
Apparent magnitude	(mV)	9.38
Distance		14.8 ± 0.1 ly (4.54 ± 0.03 pc)
Spectral type		M3V
Orbital elements
Semi-major axis	(a)	0.039 AU
Periastron	(q)	0.031 AU
Apastron	(Q)	0.047 AU
Eccentricity	(e)	0.2 ± 0.02
Orbital period	(P)	4.6938 ± 0.007 d (0.012851 y)
Argument of periastron	(ω)	6 ± 200°
Time of periastron	(T0)	2453780.085 ± 0.078 JD
Semi-amplitude	(K)	8.70 ± 0.19 m/s
Physical characteristics
Minimum mass	(m sin i)	0.037 MJ (11.8 M⊕)
Discovery information
Discovery date		January 7, 2007
Discoverer(s)		Bonfils et al.
Discovery method		HARPS
Discovery site		ESO
Discovery status		Published
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data
Exoplanet Archive		data
Open Exoplanet Catalogue		data

Gliese 674 b is an extrasolar planet approximately 15 light years away in the constellation of Ara. This planet orbits tightly around Gliese 674. It is a sub-Neptune-or-Uranus-mass planet either gaseous or rocky. It orbits as close as 0.039 AU from the star and takes only 4.6938 days to orbit. This planet has a similar eccentricity to Mercury (e=0.2). The discovery of the planet was announced on January 7, 2007 by using the HARPS spectrograph mounted on the ESO’s 3.6 meter telescope at La Silla, Chile.