Gliese 877
Gliese 877 (GJ 877 / HIP 113229 / LHS 531)[1] is a red dwarf located in the southern constellation of Octans, near the boundary with Indus.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Octans |
| Right ascension | 22h 55m 45.509s[1] |
| Declination | −75° 27′ 31.21″[1] |
| Apparent magnitude (V) | 10.377[1] |
| Characteristics | |
| Spectral type | M3V[2] |
| Astrometry | |
| Proper motion (μ) | RA: -1026.327[3] mas/yr Dec.: -1059.318[3] mas/yr |
| Parallax (π) | 116.4127 ± 0.0291 mas[3] |
| Distance | 28.017 ± 0.007 ly (8.590 ± 0.002 pc) |
| Absolute magnitude (MV) | 10.700 ± 0.0240[4] |
| Details[4] | |
| Radius | 0.442 ± 0.040 R☉ |
| Temperature | 3467 ± 100 K |
| Rotational velocity (v sin i) | 0.95 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Gliese 877's bolometric luminosity is just 2.3% of the Sun's.[5] It shines with an apparent magnitude of +10.22, so it cannot be seen with the naked eye. Nevertheless, it is considerably brighter than other red dwarfs, such as Proxima Centauri, the closest red dwarf to the Solar System; in particular, it is almost 14 times more luminous than Proxima. Of spectral type M3V,[2] its effective temperature is 3390 K.[5] It does not appear to be a variable star.[2]
Gliese 877 is 28.1 light years from the Solar System.[1] Known stars close to it are β Hydri and ζ Tucanae, respectively 4.5 and 6.2 light years.[6]
See also edit
References edit
- ^ a b c d e f LHS 531 -- High proper-motion Star (SIMBAD)
- ^ a b c Koen, C.; Kilkenny, D.; van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society. 403 (4): 1949–1968. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x. pp. 1949-1968.
- ^ a b c 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.
- ^ a b Houdebine, E. R.; Mullan, D. J.; Paletou, F.; Gebran, M. (2016). "Rotation-Activity Correlations in K and M Dwarfs. I. Stellar Parameters and Compilations of v sin I and P/sin I for a Large Sample of Late-K and M Dwarfs". The Astrophysical Journal. 822 (2): 97. arXiv:1604.07920. Bibcode:2016ApJ...822...97H. doi:10.3847/0004-637X/822/2/97. S2CID 119118088.
- ^ a b Morales, J. C.; Ribas, I.; Jordi, C. (2008). "The effect of activity on stellar temperatures and radii". Astronomy and Astrophysics. 478 (2): 507–512. arXiv:0711.3523. Bibcode:2008A&A...478..507M. doi:10.1051/0004-6361:20078324. S2CID 16238033. pp. 507-512.
- ^ Stars within 15 light-years of Luyten 49-19 (The Internet Stellar Database)