TEPCat: GJ 9827b


 

This page summarises the information held within TEPCat for the transiting planetary system GJ 9827b. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2017AJ....154..266N  
Date of discovery paper 2017 / 9 / 6 y / m / d
Right ascension 23 27 04.84 h m s
Declination −01 17 10.6 d m s
V-band apparent magnitude 10.51 mag
K-band apparent magnitude 7.19 mag
Transit duration 0.06792
( 1.6301 )
day
hour
Transit depth 0.06 %
Time of mid-transit   2457738.82646 ± 0.00043     HJD or BJD
Orbital period 1.208966 ± 0.000012 days
Reference for orbital ephemeris   arXiv:1802.09557  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 4219 ± 70 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.29 ± 0.12 dex
Stellar mass 0.650 ± 0.060   Msun
Stellar radius 0.637 ± 0.063 Rsun
Stellar logarithmic surface gravity 4.650 ± 0.050 c.g.s.
Stellar mean density 3.47 +0.27 −0.73
( 4.90 +0.38 −1.03 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0210 +0.0024 −0.0026  AU
Planetary mass 0.0118 +0.0016 −0.0015
( 3.75 +0.51 −0.48 )
Mjup
Mearth
Planetary radius 0.145 +0.015 −0.014
( 1.63 +0.17 −0.16 )
Rjup
Rearth
Planetary surface gravity 13.95 +3.91 −2.98
3.1 +0.1 −0.1
m/s2
log(cgs)
Planetary mean density 3.6 +1.5 −1.0
( 4.8 +2.0 −1.3 )
ρjup
g cm-3
Planetary equilibrium temperature 1114 +46 −26 K
Reference of detailed study arXiv:1802.09557  

 

GJ 9827b does not have an entry in the catalogue of orbital obliquity measurements.

 

GJ 9827b has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2018/06/14           John Southworth   (Keele University, UK)