HD 11964 d

Planetbox begin
name = HD 11964dPlanetbox star
star = HD 11964
constell = Cetus
ra = RA|1|57|09.6064
dec = DEC|-10|14|32.739
dist_ly = 110.83
dist_pc = 33.98
class = G5IVPlanetbox orbit
semimajor = 1.13±0.04
eccentricity = 0.63^+0.34_-0.17
period = 360±4
ang_dist = 1.366
long_peri = 40.2
t_peri = 2,411,892.03
semi-amp = 9.8Planetbox character
mass = >0.21^+0.06_-0.07 Planetbox discovery
discovery_date = 6 September 2007
discoverers = Gregory "et al."
discovery_site = flag|United States
discovery_method = Bayesian Kepler periodogram
discovery_status = Published

HD 11964d is an extrasolar planet approximately 111 light-years away in the constellation of Cetus. The planet was the third planet discovered around the yellow subgiant star HD 11964, but is the second planet in order of distance from the star. The planet is 70% the mass of Saturn, but since inclination is not known, only minimum mass is known. The orbit is extremely eccentric at the average distance of 1.13 AU, taking 360 days to complete its orbit.

The planet was discovered by using a new technique called Bayesian Kepler periodogram in September 2007 by P.C. Gregory. This technique finds trends in wobbling of stars more easier than other methods, and hence easier to detect multiple planetary systems.

References

*cite journal |url=http://fr.arxiv.org/abs/0709.0970 |title= A Bayesian periodogram finds evidence for three planets in HD 11964
author=P.C. Gregory |work=Arxiv |date=Sept 6, 2007 |accessdate=2007-09-11