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
Data/telescope used for discovery MOST  
Right ascension 08 52 35.81 h m s
Declination +28 19 51.0 d m s
Right ascension (decimal) 133.14921 degrees
Declination (decimal) 28.33083 degrees
V-band apparent magnitude 5.95 mag
K-band apparent magnitude 4.01 mag
Transit duration 0.06433
( 1.5439 ) 		day
hour
Transit depth 0.039 %
Time of mid-transit   2457178.81780 ± 0.00007     HJD or BJD
Orbital period 0.73654604 ± 0.00000016 days
Reference for orbital ephemeris   2021AJ....161..181Z  

 

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 0.873 +0.051 −0.035   Msun
Stellar radius 0.954 +0.017 −0.018 Rsun
Stellar logarithmic surface gravity 4.43 ± 0.02 c.g.s.
Stellar mean density 1.00 +0.11 −0.07
( 1.411 +0.155 −0.099 ) 		ρsun
g cm-3
Orbital eccentricity 0.05 ± 0.03  
Orbital semimajor axis   0.01544 ± 0.00005  AU
Planetary mass 0.0243 +0.0012 −0.0009
( 7.72 +0.38 −0.29 ) 		Mjup
Mearth
Planetary radius 0.1692 +0.0039 −0.0041
( 1.897 +0.044 −0.046 ) 		Rjup
Rearth
Planetary surface gravity 21.4 +2.1 −1.9
3.33 +0.04 −0.04		 m/s2
log(cgs)
Planetary mean density 4.71 +0.56 −0.53
( 6.25 +0.74 −0.70 ) 		ρjup
g cm-3
Planetary equilibrium temperature 2349 +188 −193 K
Reference of detailed study 2019ApJ...883...79D  

 

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
Zhao et al. (2023)   10   + 17   - 20  

 

 

Page generated on 2026/01/29           John Southworth   (Keele University, UK)