HD 11964

Starbox begin
name = HD 11964 Starbox observe
epoch = J2000.0
constell = Cetus
ra = RA|1|57|09.6064
dec = DEC|-10|14|32.739
appmag_v = +6.42 Starbox character
class = G5IV
b-v = +0.82
u-b =
variable = "Suspected" Starbox astrometry
radial_v = -6.9
prop_mo_ra = -368.41
prop_mo_dec = -243.15
parallax = 29.43
p_error = 0.91
dist_ly = 110.83
dist_pc = 33.98
absmag_v = +3.76 Starbox detail
age = 9.56 × 10⁹
metal = +0.17 (1.48 × Sun)
mass = 1.125
radius = 0.97
rotation =
luminosity = 2.7
temperature = 5552 Starbox catalog
names = BD-10°403, GC 2351, GJ 9063A HIP 9094, SAO 148123Starbox reference
Simbad = HD+11964
ARICNS =

HD 11964 is a yellow subgiant star approximately 111 light-years away in the constellation of Cetus. The star is more massive and luminous than our Sun and is barely visible to the naked eye. A wide binary companion star was discovered in 2000. [cite journal | url=http://aa.springer.de/papers/0356002/2300529/small.htm | author=Allen "et al." | title=Wide binaries among high-velocity and metal-poor stars | journal=Astronomy and Astrophysics | volume=356 | issue=2 | pages=529–540 | year=2000 ] Three extrasolar planets have been confirmed to orbit the star.

Planetary system

In August 2005, the announcement of two extrasolar planets were discovered orbiting the star. However, the second planet (HD 11964 c) was not officially confirmed until May 2007. In September 2007, the Bayesian Kepler periodogram has found a possible third planet (HD 11964 d) in the system, between the orbits of HD 11964 b and c. It is a Saturnian planet that orbits at 1.13 AU from the star in very eccentric orbit.

PlanetboxOrbit
exoplanet = b
mass = >0.11
period = 37.82
semimajor = 0.229
eccentricity = 0.15PlanetboxOrbit
exoplanet = d
mass = >0.21
period = 360±4
semimajor = 1.13±0.04
eccentricity = 0.63PlanetboxOrbit
exoplanet = c
mass = >0.7
period = 1940
semimajor = 3.167
eccentricity = 0.7

See also

* Eta² Hydri
* HD 37124
* Upsilon Andromedae

References

*cite journal | url=http://www.journals.uchicago.edu/doi/full/10.1086/504701 | author=Butler "et al." | title=Catalog of Nearby Exoplanets | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=505–522 | year=2006 | doi=10.1086/504701

External links

*
*
* [http://www.lpl.arizona.edu/~rory/research/xsp/dynamics/ Extrasolar Planet Interactions] by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona