HD 11964 b

HD 11964 b

Exoplanet		List of exoplanets
Parent star
Star		HD 11964
Constellation		Cetus
Right ascension	(α)	1^h 57^m 09.6064^s
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)	3.34 ± 0.4[1] AU (500 Gm)
Periastron	(q)	3.14 AU (470 Gm)
Apastron	(Q)	3.54 AU (530 Gm)
Eccentricity	(e)	0.06 ± 0.2[1]
Orbital period	(P)	2110 ± 70[1] d (5.78 y)
Orbital speed	(υ)	17.3 km/s
Argument of periastron	(ω)	168[1]°
Time of periastron	(T0)	2,454,170 ± 380[1] JD
Semi-amplitude	(K)	9.41 ± 0.39[1] m/s
Physical characteristics
Minimum mass	(m sin i)	0.61 MJ (194 M⊕)
Discovery information
Discovery date		7 August 2005
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 b is an extrasolar planet, a gas giant like Jupiter approximately 107 light-years away in the constellation of Cetus. The planet orbits the yellow subgiant star HD 11964 in a nearly-circular orbit, taking over 5 years to complete a revolution around the star at a distance of 3.34 astronomical units.^[1]

The planet was discovered in 2005 and published as part of the Catalog of Nearby Exoplanets under the designation HD 11964 b.^[2] However, since that time there has been confusion as to the designations of the planets in the HD 11964 system, leading to some sources designating this planet as "HD 11964 c".^[3][4] In a recent 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 b.^[1]

References

1. 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.
2. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
3. 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.
4. Schneider, J. "Notes for planet HD 11964 c". The Extrasolar Planets Encyclopaedia. Retrieved 2008-12-15.

Coordinates: 01^h 57^m 09.6064^s, −10° 14′ 32.739″