HD 11964 c
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | HD 11964 | |
Constellation | Cetus | |
Right ascension | (α) | 01h 57m 09.6064s |
Declination | (δ) | −10° 14′ 32.739″ |
Apparent magnitude | (mV) | 6.415 |
Distance | 107 ly (33 pc) | |
Spectral type | G5IV | |
Mass | (m) | 1.125 M☉ |
Radius | (r) | 2.234 ± 0.304 R☉ |
Temperature | (T) | 5552 K |
Metallicity | [Fe/H] | 0.17 |
Age | 9.56 Gyr | |
Orbital elements | ||
Semi-major axis | (a) | 0.229[1] AU (34.3 Gm) |
Periastron | (q) | 0.195 AU (29.1 Gm) |
Apastron | (Q) | 0.263 AU (39.4 Gm) |
Eccentricity | (e) | 0.15[1] |
Orbital period | (P) | 37.82[1] d (0.1035 y) |
Orbital speed | (υ) | 66.1 km/s |
Argument of periastron |
(ω) | 102[1]° |
Time of periastron | (T0) | 2,454,370 ± 380[1] JD |
Semi-amplitude | (K) | 4.65 ± 0.59[1] m/s |
Physical characteristics | ||
Minimum mass | (m sin i) | 0.11[1] MJ (35 M⊕) |
Discovery information | ||
Discovery date | 5 August 2005 Confirmed 27 May 2007 | |
Discoverer(s) | Butler et al. | |
Discovery method | Doppler spectroscopy | |
Discovery site | California, United States | |
Discovery status | Confirmed | |
Database references | ||
Extrasolar Planets Encyclopaedia | data | |
SIMBAD | data | |
Exoplanet Archive | data | |
Open Exoplanet Catalogue | data |
HD 11964 c is an extrasolar planet approximately 107 light-years away in the constellation of Cetus. The planet was discovered in a close-orbit around the yellow subgiant star HD 11964. The planet has a minimum mass 35 times the mass of Earth and is located in a mildly eccentric orbit which takes almost 38 days to complete. HD 11964 c was a possible planet discovered on the same day as HD 11964 b in 2005. HD 11964 c was first proposed in a paper published in 2007,[2] and finally confirmed with new data presented in a review of multi-planet systems which appeared on the arXiv preprint website in 2008.[1]
Some sources have used the designation "HD 11964 b" for this planet,[3][4] however in their review of the properties of multi-planet extrasolar planetary systems, the discovery team has stated that the correct designation for this planet is HD 11964 c and the reversed system was due to confusion related to private communications between various groups of astronomers.[1]
References
- 1 2 3 4 5 6 7 8 9 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.
- ↑ Wright, J.T.; et al. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal. 657 (1): 533–545. arXiv:astro-ph/0611658. Bibcode:2007ApJ...657..533W. doi:10.1086/510553.
- ↑ Raghavan, D.; et al. (2006). "Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal. 646 (1): 523–542. arXiv:astro-ph/0603836. Bibcode:2006ApJ...646..523R. doi:10.1086/504823.
- ↑ Schneider, J. "Notes for planet HD 11964 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-12-15.
Coordinates: 01h 57m 09.6064s, −10° 14′ 32.739″