Gliese 649 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | Gliese 649 | |
| Constellation | Hercules | |
| Right ascension | (α) | 16h 58m 08.850s[1] |
| Declination | (δ) | 25° 44′ 38.99″[1] |
| Apparent magnitude | (mV) | 9.62 |
| Distance | 33.7 ± 0.5[1] ly (10.3 ± 0.1[1] pc) | |
| Spectral type | M1.5V | |
| Orbital elements | ||
| Semi-major axis | (a) | 1.135±0.035 AU (169.8 Gm) |
| Periastron | (q) | 0.795 AU (118.9 Gm) |
| Apastron | (Q) | 1.475 AU (220.7 Gm) |
| Eccentricity | (e) | 0.30±0.08 |
| Orbital period | (P) | 598.3±4.2 d (1.638 y) |
| Orbital speed | (υ) | 20.7 km/s |
| Argument of periastron |
(ω) | 352±15° |
| Time of periastron | (T0) | 12876±22 JD |
| Semi-amplitude | (K) | 12.4±1.1 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.328±0.032 MJ |
| Discovery information | ||
| Discovery date | 2009-12-17 | |
| Discoverer(s) | Johnson et al.[2] | |
| Discovery method | Radial velocity | |
| Discovery status | Published[2] | |
| Other designations | ||
| BD+25°3173 b, HIP 83043 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
Gliese 649 b /ˈɡliːzə/, or Gl 649 b is an extrasolar planet, orbiting the 10th magnitude M-type star Gliese 649, 10 parsecs from earth. This planet is a sub-Jupiter, massing 0.328 Jupiter mass and orbits at 1.135 AU.[2]
References
- 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- 1 2 3 Johnson, John Asher; et al. (2010). "The California Planet Survey II. A Saturn-Mass Planet Orbiting the M Dwarf Gl649". The Publications of the Astronomical Society of the Pacific 122 (888): 149–155. arXiv:0912.2730. Bibcode:2010PASP..122..149J. doi:10.1086/651007.
Coordinates: 
16h 58m 09s, +25° 44′ 39″
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