HD 11964

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HD 11964

Observation data
Epoch J2000.0

Constellation
(pronunciation)

Cetus

Right ascension

1^h 57^m 09.6064^s

Declination

-10° 14′ 32.739″

Apparent magnitude (V)

+6.42

Characteristics

Spectral type

G5 IV

U-B color index

B-V color index

+0.82

Variable type

suspected

Astrometry

Radial velocity (R_v)

-6.9 km/s

Proper motion (μ)

RA: -368.41 mas/yr
Dec.: -243.15 mas/yr

Parallax (π)

29.43 ± 0.91 mas

Distance

110.83 ly (33.98 pc)

Absolute magnitude (M_V)

+3.76

Details

Mass

1.125 M_☉

Radius

0.97 R_☉

Luminosity

2.7 L_☉

Temperature

5552 K

Metallicity

+0.17 (1.48 × Sun)

Rotation

Age

9.56 × 10⁹ years

Planets

Companion

Mass (M_J)

>0.090

>0.77

>0.21

Orbital period (days)

38.02

1924

360

Semimajor axis (AU)

0.253

3.46

1.13

Eccentricity

0.22

0.05

0.63

Other designations

BD-10°403, GC 2351, GCRV 52424, HIP 9094, SAO 148123.

HD 11964 is a G-type subgiant star in the constellation Cetus. The star is more massive and luminous while cooler and smaller than our Sun. The star has apparent magnitude +6.42 and it is barely visible to the naked eye. It is 111 ly away.

1 Planetary system
2 See also
3 References
4 External links

[edit] Planetary system

In 2005, two extrasolar planets were observed orbiting the star, but one of the planets retracted on Jan 3, 2006. However in 2007, the second planet is now confirmed.

In September 2007, a Bayesian multi-planet Kepler periodogram has found a possible third planet 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.