Planet 55 Cnc b

Name 55 Cnc b
Discovered in 1996
Mass 0.8 (± 0.012) MJ
Semi-major axis 0.1134 (± 0.0006) AU
Orbital period 14.651 (± 0.0001) day
Eccentricity 0.0159 (± 0.008)
ω 164.0 deg
Tperi 2453035.0 (± 2.2) JD
Radius
Inclination
Update Aug. 29, 2012
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

  1. 24 Mar. 05: Planet e challanged; Neptune-sized planet at ~ 0.8 AU? (Wisdom, 2005)
  2. 20 apr. 03: Planet in wide (a ~ 1065 AU) binary system (Eggenberger et al 2003)
  3. 12 Feb. 03 55 Cnc is one of the 5 targets of the 14 Feb. 03 "Cosmic Call" initiative
  4. 13 Jun. 02 Periodicity at 44 d. could be due to stellar rotation, but the planet interpretation is more likely (Marcy et al 2002)
  5. 4 Dec. 01:From astrometry with HST (McGrath et al 2002), M < 30 MJ
  6. 22 Nov. 00: From astrometry (Han et al. 2000) claim a preliminary mass of 126 MJ and inclination of 179.6o
  7. 24 Jul 00: The source of RV variation remains speculative, depending on completion of one full orbit (Fischer et al 2000).
    Possible second companion; see Butler et al. 1996, Jayawardhana et al. 2000.
    The star is surrounded by a dust disk extending at least a 40 AU, with an inclination of ~ 25o. If the planets are in the same plane than the disc, this gives to the first planet a mass of 1.9+1.1 -0.4 MJ (Trilling & Brown 1998, Trilling et al 2000). But disc not confirmed by Schneider et al (2000b)
    There may by a hole with a radius of ~ 10 AU in the disk (Jayawardhana et al 2000)
  8. The star has a companion (rho Cnc B) about 1150 AU away

Other web-pages

Star

Name 55 Cnc
Distance 12.34 (± 0.4) pc
Spectral type K0IV-V
Apparent magnitude V 5.95
Mass 0.905 (± 0.015) MSun
Age 10.2 (± 2.5) Gyr
Effective temperature 5196.0 (± 24.0) K
Radius 0.943 (± 0.01) RSun
Metallicity [Fe/H] 0.31 (± 0.04)
Detected Disc
Magnetic Field
RA2000 08:52:37.0
Dec2000 +28:20:02
Alternate Names
Planetary system 5 planets

More data


Related publications

Gravitational quantization of exoplanet orbits in 55 Cnc, $\upsilon$ And, Kepler-11, Kepler-20, and Kepler-90
2014 GEROYANNIS V.
arxiv  

Revisiting rho 1 Cancri e: A New Mass Determination Of The Transiting super-Earth
2012 ENDL M., ROBERTSON P., COCHRAN W., MACQUEEN Ph., BRUGAMYER E. & 4 additional authors
ApJ, 759, 19
paper   arxiv  

55 Cancri: Stellar Astrophysical Parameters, a Planet in the Habitable Zone, and Implications for the Radius of a Transiting Super-Earth
2011 von BRAUN K., BOYAJIAN T., ten BRUMMELAAR Th., van BELLE G., KANE S. & 11 additional authors
ApJ.
arxiv

Five Planets Orbiting 55 Cancri
2008 FISCHER D., MARCY G., BUTLER P., VOGT S., LAUGHLIN G., HENRY G., ABOUAV D., PEEK K., WRIGHT J., JOHNSON J., McCARTHY C. & ISAACSON H.
ApJ., 675, 790
paper