Gliese 357
GJ 357 (also designated Gliese 357) is an M-type main sequence star with an unusually low starspot activity. It is located 31 light-years from the Solar System. The system is part of the Hydra constellation.
Artist concept of the Gliese 357 (GJ357) system. Credit: Jack Madden | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra |
| Right ascension | 09h 36m 01.63722s |
| Declination | −21° 39′ 38.8776″ |
| Apparent magnitude (V) | 10.906 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | M2.5V |
| Astrometry | |
| Radial velocity (Rv) | −35.03±0.17 km/s |
| Proper motion (μ) | RA: 138.722±0.023 mas/yr Dec.: −990.342±0.020 mas/yr |
| Parallax (π) | 105.9789 ± 0.0227 mas |
| Distance | 30.776 ± 0.007 ly (9.436 ± 0.002 pc) |
| Absolute magnitude (MV) | +11.13 |
| Details | |
| Mass | 0.362 M☉ |
| Radius | 0.333 R☉ |
| Luminosity | 0.014 L☉ |
| Surface gravity (log g) | 4.96 cgs |
| Temperature | 3,488 K |
| Metallicity [Fe/H] | −0.14 dex |
| Rotation | 74.3±1.7 d |
| Rotational velocity (v sin i) | 2.5 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
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