TEPCat: GJ 3470


 

This page summarises the information held within TEPCat for the transiting planetary system GJ 3470. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2012A+A...546A..27B  
Date of discovery paper 2012 / 6 / 26 y / m / d
Data/telescope used for discovery TRAPPIST  
Right ascension 07 59 05.87 h m s
Declination +15 23 29.4 d m s
Right ascension (decimal) 119.77446 degrees
Declination (decimal) 15.39150 degrees
V-band apparent magnitude 12.27 mag
K-band apparent magnitude 7.99 mag
Transit duration 0.07992
( 1.9181 )
day
hour
Transit depth 0.7 %
Time of mid-transit   2456340.72559 ± 0.00010     HJD or BJD
Orbital period 3.33665266 ± 0.00000030 days
Reference for orbital ephemeris   arXiv:2111.01295  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3725 ± 54 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.420 ± 0.019 dex
Stellar mass 0.476 ± 0.019   Msun
Stellar radius 0.474 ± 0.018 Rsun
Stellar logarithmic surface gravity 4.65 ± 0.06 c.g.s.
Stellar mean density 3.39 +0.30 −0.32
( 4.78 +0.42 −0.45 )
ρsun
g cm-3
Orbital eccentricity 0.017 +0.016 −0.012  
Orbital semimajor axis   0.03557 +0.00096 −0.00100  AU
Planetary mass 0.0432 ± 0.0051
( 13.7 ± 1.6 )
Mjup
Mearth
Planetary radius 0.346 ± 0.029
( 3.88 ± 0.33 )
Rjup
Rearth
Planetary surface gravity 6.8 ± 1.7
2.83 ± 0.10
m/s2
log(cgs)
Planetary mean density 0.89 ± 0.25
( 1.18 ± 0.33 )
ρjup
g cm-3
Planetary equilibrium temperature 604 ± 98 K
Reference of detailed study arXiv:2004.12812  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Stefánsson et al. (2021)   101   + 29   - 14  

 

 

GJ 3470 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2022/12/01           John Southworth   (Keele University, UK)