TEPCat: GPX-1


 

This page summarises the information held within TEPCat for the transiting brown dwarf system GPX-1. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:2009.11899  
Date of discovery paper 2020 / 9 / 28 y / m / d
Right ascension 02 33 28.61 h m s
Declination +56 01 32.6 d m s
V-band apparent magnitude 12.27 mag
K-band apparent magnitude 11.18 mag
Transit duration 0.087
( 2.09 )
day
hour
Transit depth 0.90 %
Time of mid-transit   2458770.23823 ± 0.00040     HJD or BJD
Orbital period 1.744579 ± 0.000008 days
Reference for orbital ephemeris   arXiv:2009.11899  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 7000 ± 200 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.35 ± 0.1 dex
Stellar mass 1.68 ± 0.10   Msun
Stellar radius 1.56 ± 0.10 Rsun
Stellar logarithmic surface gravity 4.27 ± 0.05 c.g.s.
Stellar mean density 0.44 ± 0.10
( 0.62 ± 0.14 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0338 ± 0.0003  AU
Planetary mass 19.7 ± 1.6
( 62624 ± 5086 )
Mjup
Mearth
Planetary radius 1.47 ± 0.10
( 16.5 ± 1.1 )
Rjup
Rearth
Planetary surface gravity 234 +35 −30
4.37 +0.06 −0.06
m/s2
log(cgs)
Planetary mean density 6.2 +1.3 −1.0
( 8.2 +1.7 −1.3 )
ρjup
g cm-3
Planetary equilibrium temperature 2300 ± 48 K
Reference of detailed study arXiv:2009.11899  

 

GPX-1 does not have an entry in the catalogue of orbital obliquity measurements.

 

GPX-1 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2021/11/15           John Southworth   (Keele University, UK)