Planet 55 Cnc c

Name 55 Cnc c
Discovered in 2002
M × sin i 0.169 (± 0.008) MJ
Semi-major axis 0.2403 (± 0.0017) AU
Orbital period 44.3446 (± 0.007) day
Eccentricity 0.053
ω 57.4 (± 11.0) deg
Tperi 2449989.3385 (± 3.3) JD
Radius
Inclination
Update June 7, 2011
Detection method detected by radial velocity
Molecules detected
Primary transit
Secondary transit
Anomaly angle
Time Vr=0
Calculated temperature
Measured temperature
Hottest point longitute
Surface gravity log(g/gH)

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. 13 Jun. 02 Periodicity at 44 d. could be due to stellar rotation, but the planet interpretation is more likely (Marcy et al 2002)
  4. 4 Dec. 01:From astrometry with HST (McGrath et al 2002), M < 30 MJ
  5. 22 Nov. 00: From astrometry (Han et al. 2000) claim a preliminary mass of 126 MJ and inclination of 179.6o
  6. Exhibits coherent variations in residual velocities consistent with additional companion.
    24 Jul. 00: the source of RV variation remains speculative, depending on completion of one full orbit (Fischer et al 2000).
  7. Possible second companion; see Butler et al. 1996, Jayawardhana et al. 2000.

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)
RA2000 08:52:37.0
Dec2000 +28:20:02
Planetary system 5 planets

More data


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