TEPCat: NGTS-4


 

This page summarises the information held within TEPCat for the transiting planetary system NGTS-4. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:1809.00678  
Date of discovery paper 2018 / 9 / 4 y / m / d
Right ascension 05 58 23.76 h m s
Declination −30 48 42.5 d m s
V-band apparent magnitude 13.14 mag
K-band apparent magnitude 11.07 mag
Transit duration 0.075
( 1.80 )
day
hour
Transit depth 0.13 %
Time of mid-transit   2457607.9975 ± 0.0034     HJD or BJD
Orbital period 1.3373508 ± 0.0000008 days
Reference for orbital ephemeris   arXiv:1809.00678  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5143 ± 100 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.28 ± 0.10 dex
Stellar mass 0.75 ± 0.02   Msun
Stellar radius 0.84 ± 0.01 Rsun
Stellar logarithmic surface gravity 4.5 ± 0.1 c.g.s.
Stellar mean density 1.27 ± 0.10
( 1.79 ± 0.14 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.68 −0.0  
Orbital semimajor axis   0.019 ± 0.005  AU
Planetary mass 0.065 ± 0.009
( 20.7 ± 2.9 )
Mjup
Mearth
Planetary radius 0.284 ± 0.023
( 3.18 ± 0.26 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 1.44 ± 0.12
( 1.91 ± 0.16 )
ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study arXiv:1809.00678  

 

NGTS-4 does not have an entry in the catalogue of orbital obliquity measurements.

 

NGTS-4 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2019/07/16           John Southworth   (Keele University, UK)