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.

Gliese 877
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[3] mas
Distance28.017 ± 0.007 ly
(8.590 ± 0.002 pc)
Absolute magnitude (MV)10.700 ± 0.0240[4]
Details[4]
Radius0.442 ± 0.040 R☉
Temperature3467 ± 100 K
Rotational velocity (v sin i)0.95 km/s
Other designations
GJ 877, HIP 113229, LHS 531[1]
Database references
SIMBADdata

Gliese 877's bolometric luminosity is just 2.3% of our 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 our 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

References
  1. LHS 531 -- High proper-motion Star (SIMBAD)
  2. 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.
  3. 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.
  4. 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.
  5. 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. pp. 507-512.
  6. Stars within 15 light-years of Luyten 49-19 (The Internet Stellar Database)


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