Gliese 504 b

Gliese 504 b
Discovery
Subaru images of GJ 504 using two near-infrared wavelengths (orange, 1.6 micrometers, taken in May 2011; blue, 1.2 micrometers, April 2012). Once processed to remove scattered starlight, the images reveal the orbiting planet, GJ 504b.
Discovered by	Kuzuhara et al.
Discovery site	Subaru Telescope
Discovery date	2013
Detection method	Direct imaging
Designations
Alternative names	GJ 504 b, 59 Virginis b, e Virginis b, HD 115383 b, HIP 64792 b
Orbital characteristics
Semi-major axis	31–129 AU
Eccentricity	0.01–0.62
Orbital period (sidereal)	155–1332 y
Inclination	111–171
Longitude of ascending node	8–173
Time of periastron	2005.07–2825.03
Argument of periastron	4–176
Star	59 Virginis (GJ 504)
Physical characteristics
Mean radius	1.08+0.04 −0.03 `R`_J
Mass	1.0+1.8 −0.3 to 17 M_J
Surface gravity	3.45+0.35 −0.25 cgs
Temperature	512±10 K (238.9 ± 10.0 °C)
Spectral type	T8

Gliese 504 b (or 59 Virginis b) is a jovian planet or a brown dwarf orbiting the solar analog 59 Virginis (Gliese 504), discovered by direct imaging using HiCIAO instrument and AO188 adaptive optics system on the Subaru Telescope of Mauna Kea Observatory, Hawaii by Kuzuhara et al.