83 Leonis A

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83 Leonis A
Stellar characteristics
Right ascension (Epoch J2000)11h 26m 45.30s
Declination (Epoch J2000)+03° 00' 47.20"
Spectral typeG6/8-K0 IV
Distance from Sol57.6 ly
Other designations83 Leo A, HR 4414, Gl 429 A, Hip 55846, HD 99491, BD+03 2502, SAO 118864, FK5 1296, LHS 2407, LTT 13109, LFT 805, Wolf 393, STF 1540 A, ADS 8162 A.
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83 Leonis A is part of a wide binary star system, along with 83 Leonis B, located around 57.6 light-years away from our Sun, Sol, in the southeastern part of the constellation Leo, the Lion. Star A is a yellow-orange to orange-red subgiant of spectral and luminosity type G6/8-K0 IV. The star may has a mass near or somewhat smaller than Sol's, as much as 1.9 times its diameter[1][2], and about 66 percent of its visual luminosity. The star appears to be around 1.2 to 2.3 times as enriched as Sol with elements heavier than hydrogen ("metallicity"), based on its abundance of iron[3][4].

The distance from 83 Leonis A where an Earth-type planet would be "comfortable" with liquid water may be centered around 0.81 AU -- between the orbital distances of Venus and Earth in the Solar System. At that distance from the star, such a planet would have an orbital period of around three fourths of an Earth year assuming that Star A has a mass near Sol's.

(Data from SolStation.com)


  1. (Pasinetti-Fracassini et al, 2001)
  2. (Johnson and Wright, 1983)
  3. (Cayrel de Strobel et al, 1991, page 292)
  4. (Extrasolar Planets Encyclopaedia)