GJ 1214
This artist's impression shows how the super-Earth orbiting the nearby star GJ 1214 may look. Credit: ESO/L. Calçada | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 15m 18.93399s |
| Declination | +04° 57′ 50.0666″ |
| Apparent magnitude (V) | 14.71±0.03 |
| Characteristics | |
| Spectral type | M4.5 |
| Apparent magnitude (B) | 16.40 |
| Apparent magnitude (R) | 14.394 ± 0.17 |
| Apparent magnitude (I) | 11.52 ± 0.03 |
| Apparent magnitude (J) | 9.750±0.024 |
| Apparent magnitude (H) | 9.094±0.024 |
| Apparent magnitude (K) | 8.782±0.020 |
| B−V color index | 1.73 |
| V−R color index | 0.9 |
| R−I color index | 2.7 |
| Variable type | planetary transit |
| Astrometry | |
| Radial velocity (Rv) | +20.91±0.65 km/s |
| Proper motion (μ) | RA: 580.202 mas/yr Dec.: −749.713 mas/yr |
| Parallax (π) | 68.2986±0.0652 mas |
| Distance | 47.75 ± 0.05 ly (14.64 ± 0.01 pc) |
| Absolute magnitude (MV) | 14.10 |
| Details | |
| Mass | 0.1820+0.0042 −0.0041 M☉ |
| Radius | 0.2162+0.0025 −0.0024 R☉ |
| Luminosity | 0.00390+0.00021 −0.00020 L☉ |
| Surface gravity (log g) | 5.0286+0.0078 −0.0088 cgs |
| Temperature | 3,101±43 K |
| Metallicity [Fe/H] | 0.24±0.11 dex |
| Rotation | 125±5 d |
| Age | 5–10 Gyr |
| Other designations | |
| Orkaria, GJ 1214, G 139-21, LHS 3275, LSPM J1715+0457, NLTT 44431, TIC 467929202, 2MASS J17151894+0457496 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
.jpg){kind=link}
GJ 1214 (sometimes Gliese 1214) is a dim M4.5 red dwarf star in the constellation Ophiuchus with an apparent magnitude of 14.7. It is located at a distance of 47.8 light-years (14.7 parsecs) from Earth. GJ 1214 hosts one known exoplanet.