TEPCat: HD 17156


 

This page summarises the information held within TEPCat for the transiting planetary system HD 17156. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007A+A...476L..13B  
Date of discovery paper 2007 / 10 / 4 y / m / d
Data/telescope used for discovery other  
Right ascension 02 49 44.49 h m s
Declination +71 45 11.6 d m s
Right ascension (decimal) 42.43537 degrees
Declination (decimal) 71.75322 degrees
V-band apparent magnitude 8.17 mag
K-band apparent magnitude 6.76 mag
Transit duration 0.13127
( 3.1505 )
day
hour
Transit depth 0.6 %
Time of mid-transit   2458809.07307 ± 0.00021     HJD or BJD
Orbital period 21.2164294 ± 0.0000061 days
Reference for orbital ephemeris   2023AJ....165..252K  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6046 +76 −72 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.208 ± 0.058 dex
Stellar mass 1.285 +0.064 −0.082   Msun
Stellar radius 1.517 +0.038 −0.036 Rsun
Stellar logarithmic surface gravity 4.207 ± 0.018 c.g.s.
Stellar mean density 0.366 +0.028 −0.025
( 0.516 +0.040 −0.035 )
ρsun
g cm-3
Orbital eccentricity 0.6772 +0.0045 −0.0044  
Orbital semimajor axis   0.1632 ± 0.0027  AU
Planetary mass 3.26 ± 0.11
( 1036 ± 34 )
Mjup
Mearth
Planetary radius 1.094 +0.031 −0.030
( 12.26 + 0.35 − 0.34 )
Rjup
Rearth
Planetary surface gravity 67.5 +3.8 −3.6
3.83 +0.02 −0.02
m/s2
log(cgs)
Planetary mean density 2.32 +0.20 −0.17
( 3.08 +0.27 −0.23 )
ρjup
g cm-3
Planetary equilibrium temperature 888 +12 −11 K
Reference of detailed study 2023AJ....165..252K  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Narita et al. (2008)   62   ±   25  
Cochran et al. (2008)   9.4   ±   9.3  
Barbieri et al. (2009)   −4.8   ±   5.3  
Narita et al. (2009)   10.0   ±   5.1  

 

 


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