Planet 55 Cnc e

Name 55 Cnc e
Discovered in 2004
Mass 0.0261775162823 (± 0.00122707107573) MJ
Semi-major axis 0.0156 (± 0.00011) AU
Orbital period 0.7365417 (± 2.8e-06) day
Eccentricity < 0.06
ω 170.0 ( -130.0 +130.0 ) deg
Tperi 2449999.83643 (± 0.0001) JD
Radius 0.177536225419 (± 0.00713713469022) RJ
Inclination 85.4 ( -2.8 +2.1 ) deg;
Update June 27, 2014
Detection Method Primary Transit
Mass Detection Method
Radius Detection method
Molecules detected
Primary transit 2455962.0697 (± 0.0018) JD
Secondary transit
Anomaly angle 72.4 (± 12.0) °
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

30 Mar 2010: Dawson et al. (2010) claim "We find that the period of 2.817 days reported in the literature for planet e (McArthur et al. 2004, Fischer et al. 2008) is actually a daily alias of its true period of 0.737 days. This new period of 0.737 days, with a refined mass of 10 Mearth, produces a significantly improved 5-planet Keplerian fit for 55 Cnc and is the shortest known period for a planet."
08 Sep 2004: If coplanarity is assumed with the planet 55 Cnc d, McArthur et al. 2004 derive a mass 17.7 ± 5.57 MEarth for the planet 55 Cnc e.

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

Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths
2015 ITO Y., IKOMA M., KAWAHARA H., NAGAHARA H., KAWASHIMA Y. et al.
ApJ, accepted
arxiv  

Understanding the Mass-Radius Relation for Sub-Neptunes: Radius as a Proxy for Composition
2013 LOPEZ E. & FORTNEY J.
ApJ, 792, 1
arxiv   paper  

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

Detecting the spin-orbit misalignment of the super-Earth 55 Cnc e
2014 BOURRIER V. & HEBRARD G.
Astron. & Astrophys., 569, A65
paper  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  

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