| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 29m 38.9939s[1] |
| Declination | +22° 52′ 57.794″[1] |
| Apparent magnitude (V) | 11.200±0.010[2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | K5V[3] or K5.5V[4] |
| Apparent magnitude (B) | 12.479±0.010[2] |
| Apparent magnitude (J) | 9.096±0.022[5] |
| Apparent magnitude (H) | 8.496±0.020[5] |
| Apparent magnitude (K) | 8.368±0.019[5] |
| Variable type | planetary transit |
| Astrometry | |
| Radial velocity (Rv) | 39.5210±0.0315[6] km/s |
| Proper motion (μ) | RA: 82.778±0.021 mas/yr[1] Dec.: −35.541±0.015 mas/yr[1] |
| Parallax (π) | 16.9818 ± 0.0189 mas[1] |
| Distance | 192.1 ± 0.2 ly (58.89 ± 0.07 pc) |
| Details[7] | |
| Mass | 0.742+0.039 −0.038 M☉ |
| Radius | 0.677±0.027 R☉ |
| Luminosity | 0.1673+0.0053 −0.0049 L☉ |
| Surface gravity (log g) | 4.68±0.10 cgs |
| Temperature | 4500+125 −75 K |
| Metallicity [Fe/H] | 0.05±0.10 dex |
| Rotation | 13.37+0.13 −0.17 d |
| Rotational velocity (v sin i) | <2 km/s |
| Age | 650±70 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
K2-136 is a K-type main-sequence star located in the zodiac constellation Taurus. It is a member of the Hyades open cluster, which provides a well-constrained young age on the system. The star is known to host three transiting exoplanets, discovered in 2017 from lightcurves gathered by the Kepler space telescope during the K2 extension mission. The innermost planet is approximately Earth-sized, the first such planet found in a young open cluster.[9]
The star is likely accompanied by a faint red dwarf of spectral type M7/8V located at a projected separation of ~40 AU.[3][7]
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