23 Librae c
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23 Librae c (23 Lib c) is an extrasolar planet like Jupiter discovered in 2009 orbiting the star 23 Librae. It has one of the longest known orbits of a planet detected via radial velocity.[1] The actual orbital period of this planet range from 4600 to 5400 days, or from 12.5 to 15 years. The reason why the error range for orbital period is so large because this planet didn't complete the orbit during the time of continuous observations. Using the range of orbital periods, this planet's average distance would sit between 5.3 and 6.3 AU, or between 790 and 940 Gm.
References
- ^ Jones, Hugh (2009). "A long-period planet orbiting a nearby Sun-like star". v1. arXiv:0912.2716 [astro-ph.EP].
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