Wednesday, November 19, 2008
Spacial Stars: Gliese 229
The red dwarf and right to it the tiny brown dwarf.
Photo: Nasa, Hubble Telescope
A pair of a red dwarf which is a flare star and a brown dwarf.
Constellation: Lepus
Age: 3 billion years
Distance: 18.8 light-years
Radial velocity: 5.2 km/sec
Space between Gliese 229 A and B: 44 AU
Gliese 229 A
Spectral class: M1
Visual magnitude: 8.15
Luminosity: 0.016×Sun
Mass: 0.46×Sun
Diameter: 0.527×Sun
Gliese 229 B(Brown Dwarf):
Luminosity: 0.000006× Sun
Mass: 0.05× Sun (45× Jupiter)
Diameter: 0.1027× Sun (1×Jupiter)
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