TEPCat: NGTS-8


 

This page summarises the information held within TEPCat for the transiting planetary system NGTS-8. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:1911.02814  
Date of discovery paper 2019 / 11 / 8 y / m / d
Right ascension 21 55 54.19 h m s
Declination −14 04 06.2 d m s
V-band apparent magnitude 13.68 mag
K-band apparent magnitude 11.64 mag
Transit duration 0.109
( 2.62 )
day
hour
Transit depth 1.5 %
Time of mid-transit   2457500.17830 ± 0.00073     HJD or BJD
Orbital period 2.49970 ± 0.00001 days
Reference for orbital ephemeris   arXiv:1911.02814  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5241 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.24 ± 0.09 dex
Stellar mass 0.89 +0.05 −0.04   Msun
Stellar radius 0.98 ± 0.02 Rsun
Stellar logarithmic surface gravity 4.41 ± 0.03 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity 0.010 +0.014 −0.010  
Orbital semimajor axis   0.035 ± 0.001  AU
Planetary mass 0.93 +0.04 −0.03
( 295.64 +12.72 −9.54 )
Mjup
Mearth
Planetary radius 1.09 ± 0.03
( 12.22 ± 0.34 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 0.67 +0.06 −0.05
( 0.889 +0.080 −0.066 )
ρjup
g cm-3
Planetary equilibrium temperature 1345 ± 19 K
Reference of detailed study arXiv:1911.02814  

 

NGTS-8 does not have an entry in the catalogue of orbital obliquity measurements.

 

NGTS-8 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2021/12/02           John Southworth   (Keele University, UK)