HD 7924 b

HD 7924 b
	HD 7924 b's orbit compared to Mercury's (0.38AU).
Discovery
Discovered by	Howard et al.
Discovery date	January 28, 2009
Detection method	radial velocity
Orbital characteristics
Semi-major axis	0.057 AU (8,500,000 km)
Eccentricity	0.17 ± 0.16
Orbital period (sidereal)	5.3978 ± 0.0015 d
Time of periastron	4727.27 ± 0.87
Argument of periastron	25 ± 60
Star	HD 7924

HD 7924 b is an extrasolar planet located approximately 55 light years away in the constellation of Cassiopeia, orbiting the 7th magnitude K-type main sequence (slightly metal poor) star HD 7924.^[1] It was published on January 28, 2009 and is the second planet discovered in the constellation Cassiopeia. Two additional planets in this system were discovered in 2015.^[2]

^ Cite error: The named reference Howard2009 was invoked but never defined (see the help page).
^ Cite error: The named reference Fulton2015 was invoked but never defined (see the help page).

Discovery
HD 7924 b's orbit compared to Mercury's (0.38AU).
Discovered by	Howard et al.
Discovery date	January 28, 2009
Detection method	radial velocity
Orbital characteristics
Semi-major axis	0.057 AU (8,500,000 km)
Eccentricity	0.17 ± 0.16
Orbital period (sidereal)	5.3978 ± 0.0015 d
Time of periastron	4727.27 ± 0.87
Argument of periastron	25 ± 60
Star	HD 7924