TEPCat: GJ 436


 

This page summarises the information held within TEPCat for the transiting planetary system GJ 436. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007A+A...472L..13G  
Date of discovery paper 2007 / 5 / 6 y / m / d
Data/telescope used for discovery other  
Right ascension 11 42 11.09 h m s
Declination +26 42 23.6 d m s
Right ascension (decimal) 175.54621 degrees
Declination (decimal) 26.70656 degrees
V-band apparent magnitude 10.68 mag
K-band apparent magnitude 6.07 mag
Transit duration 0.04189
( 1.0054 )
day
hour
Transit depth 0.6 %
Time of mid-transit   2455475.82450 ± 0.00003     HJD or BJD
Orbital period 2.64389759 ± 0.00000007 days
Reference for orbital ephemeris   2022MNRAS.514...77M  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3416 ± 54 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.03 ± 0.20 dex
Stellar mass 0.507 +0.071 −0.062   Msun
Stellar radius 0.455 ± 0.018 Rsun
Stellar logarithmic surface gravity 4.83 ± 0.03 c.g.s.
Stellar mean density 5.37 +0.30 −0.27
( 7.58 +0.42 −0.38 )
ρsun
g cm-3
Orbital eccentricity 0.1616 +0.0041 −0.0032  
Orbital semimajor axis   0.0308 +0.0013 −0.0012  AU
Planetary mass 0.0799 +0.0066 −0.0063
( 25.4 +2.1 −2.0 )
Mjup
Mearth
Planetary radius 0.366 ± 0.014
( 4.10 ± 0.16 )
Rjup
Rearth
Planetary surface gravity 13 ± 1
3.11 ± 0.03
m/s2
log(cgs)
Planetary mean density 1.55 +0.12 −0.10
( 2.06 +0.16 −0.13 )
ρjup
g cm-3
Planetary equilibrium temperature 669 ± 22 K
Reference of detailed study 2014A+A...572A..73L  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Bourrier et al. (2018)   72   + 33   - 24  
Bourrier et al. (2022)   114   + 23   - 17  

 

 


Page generated on 2024/04/19           John Southworth   (Keele University, UK)