Gliese 625
GJ 625 (AC 54 1646-56) is a red dwarf star of spectral type M2.0V, located in the constellation Draco, 21.1 light-years from Earth.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 16h 25m 24.6233s[1] |
| Declination | 54° 18′ 14.7658″[1] |
| Apparent magnitude (V) | 10.17 |
| Characteristics | |
| Spectral type | M2.0V |
| Astrometry | |
| Proper motion (μ) | RA: 432.073±0.064[1] mas/yr Dec.: −171.668±0.059[1] mas/yr |
| Parallax (π) | 154.4710 ± 0.0273[1] mas |
| Distance | 21.114 ± 0.004 ly (6.474 ± 0.001 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
Planetary system
On May 18, 2017, a planet was detected orbiting AC 54 1646-56 by the HARPS-N telescope.[2] The planet, AC 54 1646-56b (GJ 625b), orbits on the inner edge of the circumstellar habitable zone of its star, and may support liquid water.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.82±0.51 M⊕ | 0.078 | 14.628±0.013 | — | — | — |
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Suárez Mascareño, A.; et al. (2017). "HADES RV Programme with HARPS-N at TNG. V. A super-Earth on the inner edge of the habitable zone of the nearby M dwarf GJ 625". Astronomy and Astrophysics. 605. A92. arXiv:1705.06537. Bibcode:2017A&A...605A..92S. doi:10.1051/0004-6361/201730957. S2CID 119003137.
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