HIP 78530 b
Extrasolar planet / From Wikipedia, the free encyclopedia
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HIP 78530 b is an object that is either a planet or a brown dwarf in the orbit of the star HIP 78530. It was observed as early as 2000, but the object was not confirmed as one in orbit of the star HIP 78530 until a direct imaging project photographed the star in 2008. The image caught the attention of the project's science team, so the team followed up on its initial observations. HIP 78530 b orbits a young, hot, bright blue star in the Upper Scorpius association. The planet itself is over twenty-three times more massive than Jupiter, orbiting eighteen times further from its host star than Pluto does from the Sun by the estimates published in its discovery paper. In this predicted orbit, HIP 78530 b completes an orbit every twelve thousand years.[1]
Discovery | |
---|---|
Discovered by | David Lafrenière et al.[1] |
Discovery site | Gemini Observatory North, USA[1] |
Discovery date | Published January 24, 2011[2] |
Direct imaging[1] | |
Orbital characteristics | |
Epoch J2000 | |
710 (± 60)[3] AU | |
~12000[1] y | |
Star | HIP 78530 |
Physical characteristics | |
Mean radius | 1.83±0.16 RJ[4] |
Mass | 23.04 (± 4)[3] MJ |
-2.55 (± 0.13)[1] g | |
Temperature | 2800 (± 200)[1] |