TEPCat: NGTS-18


 

This page summarises the information held within TEPCat for the transiting planetary system NGTS-18. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:2103.10302  
Date of discovery paper 2021 / 3 / 19 y / m / d
Right ascension 12 02 11.09 h m s
Declination −35 32 55.0 d m s
V-band apparent magnitude 14.54 mag
K-band apparent magnitude 12.87 mag
Transit duration 0.1500
( 3.600 )
day
hour
Transit depth 0.8 %
Time of mid-transit   2458564.4506 ± 0.0007     HJD or BJD
Orbital period 3.05125 ± 0.00001 days
Reference for orbital ephemeris   arXiv:2103.10302  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5610 ± 150 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.15 ± 0.1 dex
Stellar mass 1.003 +0.030 −0.025   Msun
Stellar radius 1.39 ± 0.21 Rsun
Stellar logarithmic surface gravity 4.15 ± 0.07 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0448 ± 0.0068  AU
Planetary mass 0.409 +0.081 −0.063
( 130 +25 −20 )
Mjup
Mearth
Planetary radius 1.21 ± 0.18
( 13.6 ± 2.0 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 0.21 +0.19 −0.09
( 0.28 +0.25 −0.12 )
ρjup
g cm-3
Planetary equilibrium temperature 1381 +55 −53 K
Reference of detailed study arXiv:2103.10302  

 

NGTS-18 does not have an entry in the catalogue of orbital obliquity measurements.

 

NGTS-18 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)