Gliese 849 b
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | Gliese 849 | |
Constellation | Aquarius | |
Right ascension | (α) | 22h 9m 40.343s[1] |
Declination | (δ) | –4° 38′ 26.62″[1] |
Apparent magnitude | (mV) | 10.42 |
Distance | ±0.6 29.7[1] ly (±0.2 9.1[1] pc) | |
Spectral type | M3.5V | |
Orbital elements | ||
Semi-major axis | (a) | ±0.082 2.39[2] AU |
Eccentricity | (e) | ±0.019 0.038[2] |
Orbital period | (P) | ±15 1924[2] d |
Argument of periastron |
(ω) | ±28 66[2]° |
Time of periastron | (T0) | 453770±150 2[2] JD |
Semi-amplitude | (K) | ±0.94 23.96[2] m/s |
Physical characteristics | ||
Minimum mass | (m sin i) | ±0.036 0.911[2] MJ |
Discovery information | ||
Discovery date | August 2006 | |
Discoverer(s) | California and Carnegie Planet Search | |
Discovery method | radial velocity | |
Discovery site | W. M. Keck Observatory![]() | |
Discovery status | Published | |
Database references | ||
Extrasolar Planets Encyclopaedia | data | |
SIMBAD | data | |
Exoplanet Archive | data | |
Open Exoplanet Catalogue | data |
Gliese 849 b is an extrasolar planet approximately 29 light years away in the constellation of Aquarius. It is the first long-period Jupiter-like planet discovered around a red dwarf, announced in August 2006 by the California and Carnegie Planet Search team using the radial velocity technique. The previously longest-period Jupiter-like planet around a red dwarf was Gliese 876 b. There are, however, two disproven longer period Jupiter-like planets around Lalande 21185. There are indications of a possible second companion. The planet's mass is less than that of Jupiter, though only the minimum mass is known. The distance of the planet is 2.35 AU and it takes 5.17 years (1890 days) to revolve in a circular orbit.[3]
- Diagram of the probable structure of the Gliese 849 Star system
See also
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 4 5 6 7 Feng, Y. Katherina; et al. (2015). "The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets". The Astrophysical Journal. 800. 22. arXiv:1501.00633. Bibcode:2015ApJ...800...22F. doi:10.1088/0004-637X/800/1/22.
- ↑ Butler, R. Paul; et al. (2006). "A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ 849". The Astronomical Society of the Pacific. 118: 1685–1689. arXiv:astro-ph/0610179. Bibcode:2006PASP..118.1685B. doi:10.1086/510500. JSTOR 10.1086/510500.
External links
- "Gj 849". Exoplanets.
Coordinates: