Gliese 674 b

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.^[1]

Gliese 674 b

Discovery[1]
Discovered by	Bonfils et al.
Discovery site	ESO
Discovery date	January 7, 2007
Detection method	HARPS
Orbital characteristics[2]
Semi-major axis	0.03867087(15) AU
Eccentricity	0.242+0.012 −0.013
Orbital period (sidereal)	4.69502±0.00003 d
Time of periastron	2453160.26±0.04
Argument of periastron	138.1°±2.9°
Semi-amplitude	8.68+0.11 −0.12 m/s
Star	Gliese 674
Physical characteristics
Mass	≥10.95±0.14 M🜨[2]