Planet 55 Cnc Ac

Detailed information about planet 55 Cnc Ac and its parameters.

Planet

Name
55 Cnc Ac
Planet Status
Confirmed
Discovered in
2002
Update
2024-06-19
Mass
0.1784 ( +0.0275 -0.0078 ) MJ
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity
ω
Tperi
Radius
Inclination
Detection Method
Radial Velocity
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
10.48 ( ± 0.21 ) m/s
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names
rho1 Cnc Ac
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

  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.

Star

A red dwarf companion star (spT M4.5V) lies 1065 AUs away.

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