TEPCat: HAT-P-2


 

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

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007ApJ...670..826B  
Date of discovery paper 2007 / 4 / 29 y / m / d
Data/telescope used for discovery HAT  
Right ascension 16 20 36.36 h m s
Declination +41 02 53.1 d m s
Right ascension (decimal) 245.15150 degrees
Declination (decimal) 41.04808 degrees
V-band apparent magnitude 8.71 mag
K-band apparent magnitude 7.60 mag
Transit duration 0.1787
( 4.289 )
day
hour
Transit depth 0.6 %
Time of mid-transit   2458956.23792 ± 0.00013     HJD or BJD
Orbital period 5.6334665 ± 0.0000014 days
Reference for orbital ephemeris   2023ApJS..268....2S  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6290 ± 60 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.14 ± 0.08 dex
Stellar mass 1.279 ± 0.046   Msun
Stellar radius 1.680 ± 0.150 Rsun
Stellar logarithmic surface gravity 4.092 ± 0.074 c.g.s.
Stellar mean density 0.268 ± 0.070
( 0.378 ± 0.099 )
ρsun
g cm-3
Orbital eccentricity 0.5091 ± 0.0005  
Orbital semimajor axis   0.06740 ± 0.00081  AU
Planetary mass 9.02 ± 0.10
( 2867 ± 31 )
Mjup
Mearth
Planetary radius 1.190 ± 0.120
( 13.3 ± 1.3 )
Rjup
Rearth
Planetary surface gravity 152 ± 30
4.18 ± 0.08
m/s2
log(cgs)
Planetary mean density 5.1 ± 1.5
( 6.8 ± 2.0 )
ρjup
g cm-3
Planetary equilibrium temperature 1516 ± 66 K
Reference of detailed study 2023AJ....166..136D  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Winn et al. (2007)   1.2   ±   13.4  
Loeillet et al. (2008)   0.2   + 12.2   - 12.5  
Albrecht et al. (2012)   9   ±   10  

 

 


Page generated on 2024/04/19           John Southworth   (Keele University, UK)