Difference between revisions of "83 Leonis B"
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|other designations=83 Leo B, Gl 429 B, Hip 55848, HD 99492, BD+03 2503, SAO 118865, LHS 2408, LTT 13110, LFT 806, Wolf 394, STF 1540 B, ADS 8162 B | |other designations=83 Leo B, Gl 429 B, Hip 55848, HD 99492, BD+03 2503, SAO 118865, LHS 2408, LTT 13110, LFT 806, Wolf 394, STF 1540 B, ADS 8162 B | ||
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Revision as of 04:12, 15 April 2010
| 83 Leonis B | |
| Stellar characteristics | |
|---|---|
| Constellation | Leo |
| Right ascension (Epoch J2000) | 11h 26m 45.3s |
| Declination (Epoch J2000) | +03° 00' 47.2" |
| Spectral type | K2 V-IV |
| Distance from Sol | 57.6. ± 0.02 ly |
| Other designations | 83 Leo B, Gl 429 B, Hip 55848, HD 99492, BD+03 2503, SAO 118865, LHS 2408, LTT 13110, LFT 806, Wolf 394, STF 1540 B, ADS 8162 B |
| Planets | 83 Leonis Bb |
83 Leonis B is the companion to 83 Leonis A in the 83 Leonis AB stellar system. It is an orange-red main sequence dwarf to subgiant star of spectral and luminosity type K2 V-IV. The star has 88 percent of Sol's mass (exoplanets.org), around 81 percent of its diameter (Pasinetti-Fracassini et al, 2001; and Johnson and Wright, 1983), and about 24 percent of its visual luminosity.
On January 2005, astronomers announced the discovery of a planet with at least 36 times the mass of Earth around Star B (more below -- exoplanets.org; and Marcy et al, 2005).
For 83 Leonis B the water-zone orbital distance may be centered around 0.49 AU (between the orbit distances of Mercury and Venus) with a period of about 133 days -- 36.6 percent of an Earth year. However, the present of a large planet with at least 36 Earth-masses at 0.12 AUs would probably disrupt the orbit of such a Earth-type planet. Astronomers would find it very difficult to detect such planets using present methods.
(Boilerplate from SolStation.com)
Known Places around 83 Leonis B
- 83 Leonis Bb (HD 94492 b): On January 2005, a team of astronomers (Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, Debra Fischer, Gregory W. Henry, Greg Laughlin, Jason T. Wright, and John A. Johnson) announced the discovery of a planet around Star B (exoplanets.org; and Marcy et al, 2005). Designated "HD 99492 b," the planet has at least 36 times the mass of Earth (more than twice the mass of Neptune and Uranus, and 11.2 percent of Jupiter's mass). It moves around 83 Leonis B at an average distance of only 0.119 AUs in a highly circular orbit (e= 0.05 +/- 0.12) that takes only 17.038 +/- 0.00536 days to complete
