WASP-36
Star in the constellation Hydra
From Wikipedia, the free encyclopedia
WASP-36 is a G-type main-sequence star about 1,230 light-years away in the Hydra constellation.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra[1] |
| Right ascension | 08h 46m 19.2977s[2] |
| Declination | −08° 01′ 37.016″[2] |
| Apparent magnitude (V) | 12.7[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | G2V[4] |
| B−V color index | 0.4[citation needed] |
| J−H color index | 0.256[citation needed] |
| J−K color index | 0.315[citation needed] |
| Astrometry | |
| Radial velocity (Rv) | −12.45±0.97[2] km/s |
| Proper motion (μ) | RA: −4.040 mas/yr[2] Dec.: −8.502 mas/yr[2] |
| Parallax (π) | 2.6493±0.0129 mas[2] |
| Distance | 1,231 ± 6 ly (377 ± 2 pc) |
| Details[5] | |
| Mass | 1.03+0.033 −0.036 M☉ |
| Radius | 0.966+0.013 −0.014 R☉ |
| Luminosity | 1.202+0.089 −0.081 L☉ |
| Surface gravity (log g) | 4.4807+0.0086 −0.0085 cgs |
| Temperature | 6150+110 −100 K |
| Metallicity [Fe/H] | −0.26±0.10[6] dex |
| Rotational velocity (v sin i) | 3.3±1.2[4] km/s |
| Age | 1.01+1.1 −0.68 Gyr |
| Other designations | |
| TOI-567, TIC 13349647, WASP-36, 2MASS J08461929-0801370, DENIS J084619.3-080136[3] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Star characteristics
WASP-36 is a yellow main sequence star of spectral class G2, similar to the Sun.[7] It has a candidate stellar companion with apparent magnitude 14.03,[8][9] seemingly confirmed in 2019 using Gaia DR2 data.[10]
Planetary system
In 2010, the SuperWASP survey found the hot Jupiter class planet WASP-36b using the transit method.[11] Its temperature was measured to be 1705±44 K.[12] 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.[6]
The planetary dayside temperature measured in 2020 is 1440+150
−160 K.[13]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.281+0.070 −0.071 MJ |
0.02635+0.00028 −0.00031 |
1.53736533(14) | 0.0087+0.0097 −0.0061 |
83.42+0.12 −0.11° |
1.270+0.018 −0.019 RJ |