TEPCat: HATS-2

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

Note that the declination of HATS-2 was given as "-22 21 46.8" in version 1 of the discovery paper but as "-22 33 46.8" in version 2 of the discovery paper. The declination from version 2 appears to be the correct one.

Discovery and basic observable quantities:
Quantity	Value	Unit
Reference of discovery paper	2013A+A...558A..55M
Date of discovery paper	2013 / 4 / 9	y / m / d
Data/telescope used for discovery	HATS
Right ascension	11 46 57.38	h m s
Declination	−22 33 46.8	d m s
Right ascension (decimal)	176.73908	degrees
Declination (decimal)	-22.56300	degrees
V-band apparent magnitude	13.56	mag
K-band apparent magnitude	11.39	mag
Transit duration	0.0861 ( 2.066 )	day hour
Transit depth	2.2	%
Time of mid-transit	2458591.084931 ± 0.000096	HJD or BJD
Orbital period	1.35413379 ± 0.00000008	days
Reference for orbital ephemeris	2024A+A...685A.131B

Physical properties from the most recent detailed study:
Quantity	Value	Unit
Stellar effective temperature	5227 ± 95	K
Stellar metal abundance ([Fe/H] or [M/H])	+0.15 ± 0.05	dex
Stellar mass	0.904 ± 0.052	Msun
Stellar radius	0.876 ± 0.020	Rsun
Stellar logarithmic surface gravity	4.510 ± 0.012	c.g.s.
Stellar mean density	1.346 ± 0.028 ( 1.899 ± 0.040 )	ρsun g cm^-3
Orbital eccentricity	0.0
Orbital semimajor axis	0.02317 ± 0.00044	AU
Planetary mass	1.37 ± 0.16 ( 435 ± 50 )	Mjup Mearth
Planetary radius	1.122 ± 0.024 ( 12.58 ± 0.27 )	Rjup Rearth
Planetary surface gravity	27.0 ± 2.9 3.43 ± 0.04	m/s2 log(cgs)
Planetary mean density	0.91 ± 0.10 ( 1.21 ± 0.13 )	ρjup g cm^-3
Planetary equilibrium temperature	1550 ± 29	K
Reference of detailed study	2024A+A...685A.131B

Entries in the catalogue of orbital obliquity measurements:
Reference	λ (degrees)
Mohler-Fischer et al. (2013)	8 ± 8
Biagiotti et al. (2024)	3 ± 18

Page generated on 2025/03/24 John Southworth (Keele University, UK)