TEPCat: NGTS-2


 

This page summarises the information held within TEPCat for the transiting planetary system NGTS-2. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:1805.10449  
Date of discovery paper 2018 / 5 / 27 y / m / d
Right ascension 14 20 29.49 h m s
Declination −31 12 06.7 d m s
V-band apparent magnitude 10.96 mag
K-band apparent magnitude 9.80 mag
Transit duration 0.1944
( 4.666 )
day
hour
Transit depth 1.1 %
Time of mid-transit   2457501.99114 ± 0.00050     HJD or BJD
Orbital period 4.5111204 ± 0.0000018 days
Reference for orbital ephemeris   arXiv:1809.07709  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6450 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.09 ± 0.09 dex
Stellar mass 1.302 ± 0.034   Msun
Stellar radius 1.62 ± 0.09 Rsun
Stellar logarithmic surface gravity 4.135 ± 0.028 c.g.s.
Stellar mean density 0.309 ± 0.028
( 0.436 ± 0.040 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0584 ± 0.0011  AU
Planetary mass 0.670 ± 0.089
( 212 ± 28 )
Mjup
Mearth
Planetary radius 1.536 ± 0.062
( 17.22 ± 0.69 )
Rjup
Rearth
Planetary surface gravity 6.5 +1.1 −0.9
2.81 +0.07 −0.06
m/s2
log(cgs)
Planetary mean density 0.183 ± 0.033
( 0.243 ± 0.044 )
ρjup
g cm-3
Planetary equilibrium temperature 1638 ± 29 K
Reference of detailed study arXiv:1809.07709  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Anderson et al. (2018)   −11.3   ±   4.8  

 

 

NGTS-2 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2019/07/02           John Southworth   (Keele University, UK)