TEPCat: K2-280


 

This page summarises the information held within TEPCat for the transiting planetary system K2-280. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2018AJ....156..277  
Date of discovery paper 2018 / 10 / 10 y / m / d
Right ascension 19 26 22.88 h m s
Declination −22 14 51.6 d m s
V-band apparent magnitude 12.54 mag
K-band apparent magnitude 10.77 mag
Transit duration 0.3445
( 8.268 )
day
hour
Transit depth 0.32 %
Time of mid-transit   2457307.58114 ± 0.00056     HJD or BJD
Orbital period 19.89526 ± 0.00028 days
Reference for orbital ephemeris   arXiv:2007.07939  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5500 ± 100 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.33 ± 0.08 dex
Stellar mass 1.03 ± 0.03   Msun
Stellar radius 1.28 ± 0.07 Rsun
Stellar logarithmic surface gravity 4.31 ± 0.05 c.g.s.
Stellar mean density 0.57 +0.11 −0.09
( 0.80 +0.16 −0.13 )
ρsun
g cm-3
Orbital eccentricity 0.35 +0.05 −0.04  
Orbital semimajor axis   0.1461 +0.0099 −0.0097  AU
Planetary mass 0.117 ± 0.018
( 37.2 ± 5.7 )
Mjup
Mearth
Planetary radius 0.669 ± 0.039
( 7.50 ± 0.44 )
Rjup
Rearth
Planetary surface gravity 6.5 +1.1 −1.0
2.81 +0.07 −0.07
m/s2
log(cgs)
Planetary mean density 0.36 +0.10 −0.08
( 0.48 +0.13 −0.11 )
ρjup
g cm-3
Planetary equilibrium temperature 787 ± 17 K
Reference of detailed study arXiv:2007.07939  

 

K2-280 does not have an entry in the catalogue of orbital obliquity measurements.

 

K2-280 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2021/11/15           John Southworth   (Keele University, UK)