TEPCat: NGTS-9


 

This page summarises the information held within TEPCat for the transiting planetary system NGTS-9. 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 09 27 40.96 h m s
Declination −19 20 50.3 d m s
V-band apparent magnitude 12.80 mag
K-band apparent magnitude 11.45 mag
Transit duration 0.085
( 2.04 )
day
hour
Transit depth 0.5 %
Time of mid-transit   2457671.8109 ± 0.0027     HJD or BJD
Orbital period 4.43527 ± 0.00002 days
Reference for orbital ephemeris   arXiv:1911.02814  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6330 ± 130 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.31 ± 0.15 dex
Stellar mass 1.34 ± 0.05   Msun
Stellar radius 1.38 ± 0.04 Rsun
Stellar logarithmic surface gravity 4.37 ± 0.20 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity 0.060 +0.076 −0.052  
Orbital semimajor axis   0.058 +0.003 −0.002  AU
Planetary mass 2.90 ± 0.17
( 921 ± 54 )
Mjup
Mearth
Planetary radius 1.07 ± 0.06
( 11.99 ± 0.67 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 2.21 +0.40 −0.37
( 2.93 +0.53 −0.49 )
ρjup
g cm-3
Planetary equilibrium temperature 1448 ± 36 K
Reference of detailed study arXiv:1911.02814  

 

NGTS-9 does not have an entry in the catalogue of orbital obliquity measurements.

 

NGTS-9 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)