HD 187123 b
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | HD 187123 | |
Constellation | Cygnus | |
Right ascension | (α) | 19h 46m 58.113s[1] |
Declination | (δ) | +34° 25′ 10.28″[1] |
Distance | ±4 157[1] ly (±1 48[1] pc) | |
Spectral type | G5V | |
Orbital elements | ||
Semi-major axis | (a) | 13±0.00034 0.042[2] AU |
Eccentricity | (e) | ±0.0046 0.0093[2] |
Orbital period | (P) | 5886±0.0000043 3.096[2] d |
Argument of periastron |
(ω) | ±200 360[2]° |
Time of periastron | (T0) | 454342.87±0.30 2[2] JD |
Semi-amplitude | (K) | ±0.36 68.91[2] m/s |
Physical characteristics | ||
Minimum mass | (m sin i) | ±0.0026 0.5074[2] MJ |
Discovery information | ||
Discovery date | 9 September 1998 | |
Discoverer(s) | Butler, Marcy, Vogt, Apps et al. | |
Discovery method | radial velocity | |
Discovery site | California, United States | |
Discovery status | Published |
HD 187123 b is a typical "hot Jupiter" located approximately 156 light-years away in the constellation of Cygnus, orbiting the star HD 187123. It has a mass about half that of Jupiter and it orbits in a very tight, round orbit around the star every three days.[3][4]
The star has also been monitored for possible transits by the planet, but none was found.
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. (1998). "A Planet with a 3.1 Day Period around a Solar Twin". Publications of the Astronomical Society of the Pacific. 110 (754): 1389–1393. Bibcode:1998PASP..110.1389B. doi:10.1086/316287.
- ↑ Wright, J. T.; et al. (2009). "Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems". The Astrophysical Journal. 693 (2): 1084–1099. arXiv:0812.1582. Bibcode:2009ApJ...693.1084W. doi:10.1088/0004-637X/693/2/1084.
External links
- "Notes for planet HD 187123 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-25.
- "HD 187123". Exoplanets. Retrieved 2008-08-25.
Coordinates:
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