Planet gamma Cephei b

Name gamma Cephei b
Discovered in 2003
Mass 1.85 (± 0.06) MJ
Semi-major axis 2.05 (± 0.06) AU
Orbital period 903.3 (± 1.5) day
Eccentricity 0.049 (± 0.034)
ω 94.6 (± 34.6) deg
Tperi 53147.0 (± 71.0) JD
Radius
Inclination 9.6 (± 5.9) deg;
Update July 10, 2014
Detection Method Radial Velocity
Mass Detection Method
Radius Detection method
Molecules detected
Primary transit
Secondary transit
Anomaly angle
impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitute
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Observability Predictor

Remarks

11 Jan 2011: Reffert et al. 2011 give a mass range derived from astrometry 5.0 - 26.9 MJup at the 3 σ level .
The errors on inclination are at the 3 σ level (Reffert et al. 2011) 27 September 02: The star is part of a binary system with period 70 yrs ± 16 yrs, with an eccentricity of 0.439 ± 0.06 (Cochran et al 2002).

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Star

Name gamma Cephei
Distance 13.79 pc
Spectral type K1III-IV
Apparent magnitude V 3.22
Mass 1.4 (± 0.12) MSun
Age 6.6 Gyr
Effective temperature 4800.0 (± 100.0) K
Radius 4.9 RSun
Metallicity [Fe/H] 0.18
Detected Disc
Magnetic Field
RA2000 23:39:20.0
Dec2000 +77:37:56
Alternate Names
Planetary system 1 planet

Remarks

15 Nov. 06: Binary star companion at 1.467 arc sec; orbital period 67.5 ± 1.4 yr and an orbit inclination 119 ± deg.(Neuhäuser et al 200T)

More data


Related publications

On the Likelihood of Planet Formation in Close Binaries
2015 JANG-CONDELL H.
ApJ, 799, 147
paper  arxiv  

News From The Gamma Cephei Planetary System
2011 ENDL M., COCHRAN W., HATZES A. & WITTENMYER R.
arxiv

Mass constraints on substellar companions candidates from the re-reduced Hipparcos intermediate astrometric data: Nine confirmed planets and two confirmed brown dwarfs
2011 REFFERT S. & QUIRRENBACH A.
Astron. & Astrophys., 527, A140
paper   arxiv

A Planetary Companion to Gamma Cephei A.
2003 HATZES A., COCHRAN W., ENDL M., McARTHUR B., PAULSON D., WALKER G., CAMPBELL B. & YANG S.
ApJ., 599, 1383
paper

Direct detection of exoplanet host star companion $\gamma$ Cep B and revised masses for both stars and the sub-stellar object
2007 NEUHÄUSER R., MUGRAUER M., FUKAGAWA M., TORRES G. & SCHMIDT T.
Astron. & Astrophys., 462, 777
paper   preprint

The planet host star gamma Cephei: physical prperties, the binary orbit and the mass of the substellar companion
2006 TORRES G.
ApJ.
preprint