TEPCat: G 9-40


 

This page summarises the information held within TEPCat for the transiting planetary system G 9-40. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:1912.00291  
Date of discovery paper 2019 / 12 / 2 y / m / d
Data/telescope used for discovery K2  
Right ascension 08 58 52.33 h m s
Declination +21 04 34.2 d m s
Right ascension (decimal) 134.71804 degrees
Declination (decimal) 21.07617 degrees
V-band apparent magnitude 13.82 mag
K-band apparent magnitude 9.19 mag
Transit duration 0.0705
( 1.692 )
day
hour
Transit depth 0.37 %
Time of mid-transit   2459503.32682 ± 0.00042     HJD or BJD
Orbital period 5.7459982 ± 0.0000020 days
Reference for orbital ephemeris   arXiv:2208.07287  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3395 ± 51 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.07 ± 0.16 dex
Stellar mass 0.295 ± 0.014   Msun
Stellar radius 0.3026 ± 0.0095 Rsun
Stellar logarithmic surface gravity 4.84 ± 0.04 c.g.s.
Stellar mean density 10.00 +0.70 −0.65
( 14.11 + 0.99 − 0.92 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.04180 ± 0.00064  AU
Planetary mass 0.0126 ± 0.0020
( 4.01 ± 0.64 )
Mjup
Mearth
Planetary radius 0.1695 ± 0.0058
( 1.900 ± 0.065 )
Rjup
Rearth
Planetary surface gravity 10.8 ± 1.8
3.03 ± 0.07
m/s2
log(cgs)
Planetary mean density 2.41 +0.51 −0.40
( 3.20 +0.68 −0.53 )
ρjup
g cm-3
Planetary equilibrium temperature 441 ± 8 K
Reference of detailed study arXiv:2208.07287  

 

G 9-40 does not have an entry in the catalogue of orbital obliquity measurements.

 

G 9-40 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2022/12/07           John Southworth   (Keele University, UK)