TEPCat: 55 Cnc e


 

This page summarises the information held within TEPCat for the transiting planetary system 55 Cnc e. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2011ApJ...737L..18W  
Date of discovery paper 2011 / 4 / 27 y / m / d
Right ascension 08 52 36.13 h m s
Declination +28 19 53.0 d m s
V-band apparent magnitude 5.95 mag
K-band apparent magnitude 4.01 mag
Transit duration 0.0660
( 1.584 )
day
hour
Transit depth 0.037 %
Time of mid-transit   2457063.2096 ± 0.0005     HJD or BJD
Orbital period 0.73654737 ± 0.0000014 days
Reference for orbital ephemeris   arXiv:1807.04301  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5172 ± 18 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.35 ± 0.10 dex
Stellar mass 0.905 ± 0.015   Msun
Stellar radius 0.943 ± 0.010 Rsun
Stellar logarithmic surface gravity 4.43 ± 0.02 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity 0.05 ± 0.03  
Orbital semimajor axis   0.01544 ± 0.00005  AU
Planetary mass 0.0251 ± 0.0010
( 7.98 ± 0.32 )
Mjup
Mearth
Planetary radius 0.1673 ± 0.0026
( 1.875 ± 0.029 )
Rjup
Rearth
Planetary surface gravity 21.4 +2.1 −1.9
3.33 +0.04 −0.04
m/s2
log(cgs)
Planetary mean density 5.02 +0.32 −0.30
( 6.66 +0.42 −0.40 )
ρjup
g cm-3
Planetary equilibrium temperature 2349 +188 −193 K
Reference of detailed study arXiv:1807.04301  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Bourrier & Hébrard (2014)   72.4   + 12.7   - 11.5  
López-Morales et al. (2014) indeterminate

 

 

55 Cnc e has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2018/08/14           John Southworth   (Keele University, UK)