WASP-36

WASP-36 is a yellow main sequence star in the Hydra constellation.

WASP-36

Observation data Epoch J2000      Equinox
Constellation	Hydra
Right ascension	08h 46m 19.2978s
Declination	−08° 01′ 37.0127″
Apparent magnitude (V)	12.7
Characteristics
Evolutionary stage	main sequence star
Spectral type	G2V
B−V color index	0.4
J−H color index	0.256
J−K color index	0.315
Astrometry
Radial velocity (Rv)	-13.2169±0.0024 km/s
Proper motion (μ)	RA: -4.077±0.053 mas/yr Dec.: -8.710±0.041 mas/yr
Parallax (π)	2.5599±0.0345 mas
Distance	1,270 ± 20 ly (391 ± 5 pc)
Details[1][2]
Mass	1.03+0.033 −0.036[3] M☉
Radius	0.966+0.013 −0.014[3] R☉
Luminosity	1.202+0.089 −0.081[3] L☉
Surface gravity (log g)	4.4807+0.0086 −0.0085[3] cgs
Temperature	6150+110 −100[3] K
Metallicity [Fe/H]	-0.26±0.10 dex
Rotational velocity (v sin i)	3.3±1.2 km/s
Age	1.01+1.1 −0.68 Gyr
Other designations
WASP-36, DENIS J084619.3-080136, 2MASS J08461929-0801370, Gaia DR2 5750936092375254016[4]
Database references
SIMBAD	data

Star characteristics

WASP-36 is a yellow main sequence star of spectral class G2, similar to the Sun.^[5] It has an unconfirmed stellar companion with apparent magnitude 14.03.^[6][7]

Planetary system

In 2010, the SuperWASP survey found the Hot Jupiter class planet WASP-36b using the transit method.^[8] Its temperature was measured to be 1705±44 K.^[9] The planetary transmission spectrum taken in 2016 has turned out to be anomalous: the planet appears to be surrounded by a blue-tinted halo that is too wide to be an atmosphere and may represent a measurement error.^[10]

Planetary dayside temperature measured in 2020 is 1440⁺¹⁵⁰
₋₁₆₀ K.^[11]

The WASP-36 planetary system^[1][12][2]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	2.295±0.058 MJ	0.02643±0.00026	1.5373639±0.0000014	0.0087+0.0097 −0.0061[3]	83.42+0.12 −0.11[3]°	1.270+0.018 −0.019[3] RJ