HD 11964 b

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 11964 b
Exoplanet List of exoplanets
Parent star
Star HD 11964
Constellation Cetus
Right ascension (α) 1h 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) 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
(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
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]


  1. ^ a b c d e f g h 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. Bibcode:2009ApJ...693.1084W. arXiv:0812.1582Freely accessible. 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. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493Freely accessible. 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. Bibcode:2006ApJ...646..523R. arXiv:astro-ph/0603836Freely accessible. doi:10.1086/504823. 
  4. ^ Schneider, J. "Notes for planet HD 11964 c". The Extrasolar Planets Encyclopaedia. Retrieved 2008-12-15. 

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