Ross 47
Ross 47 is a flare star of spectral type M4 located in the constellation Orion, 19 light-years from Earth.[1]
| Observation data Epoch J1950.0 Equinox J1950.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 42m 09.26772s[1] |
| Declination | +12° 29′ 21.6225″[1] |
| Apparent magnitude (V) | +11.509[2] |
| Characteristics | |
| Spectral type | M4.0Vn |
| U−B color index | +14.264 |
| B−V color index | +13.130 |
| Variable type | BY Dra[2] |
| Astrometry | |
| Radial velocity (Rv) | 105.83 ± 0.18 km/s |
| Proper motion (μ) | RA: 2000.53[1] mas/yr Dec.: −1569.63[1] mas/yr |
| Parallax (π) | 171.55 ± 3.99[1] mas |
| Distance | 19.0 ± 0.4 ly (5.8 ± 0.1 pc) |
| Absolute magnitude (MV) | +12.75 |
| Details | |
| Mass | 0.35 M☉ |
| Radius | 0.17 R☉ |
| Luminosity | 0.00069 L☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
- van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- "Ross 47". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 August 2017.
- Dittmann, Jason A.; Irwin, Jonathan M.; Charbonneau, David; Berta-Thompson, Zachory K. (2014). "Trigonometric Parallaxes for 1507 Nearby Mid-to-late M Dwarfs". The Astrophysical Journal. 784 (2): 156. arXiv:1312.3241. Bibcode:2014ApJ...784..156D. doi:10.1088/0004-637X/784/2/156. Table with parallaxes.
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