Gliese 676

Gliese 676 A/B
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ara
Right ascension 17h 30m 11.20s[1]
Declination –51° 38′ 13.1″[1]
Apparent magnitude (V) 9.59
Characteristics
Spectral type M0V[2]/M3V
Apparent magnitude (B) 11.05/14.8
Apparent magnitude (J) 6.711
Apparent magnitude (H) 6.082
Apparent magnitude (K) 5.825
B−V color index 1.46
Astrometry
Radial velocity (Rv)−39.82±0.14[3] km/s
Proper motion (μ) RA: −258.759±0.034[3] mas/yr
Dec.: −185.119±0.025[3] mas/yr
Parallax (π)62.5786 ± 0.0303 mas[3]
Distance52.12 ± 0.03 ly
(15.980 ± 0.008 pc)
Absolute magnitude (MV)8.55
Details
Mass0.631±0.017[4]/0.29[5] M
Radius0.617+0.028
−0.027
[4] R
Luminosity0.08892±0.00220[4] L
Temperature4,014+94
−90
[4] K
Metallicity [Fe/H]0.23±0.10[5] dex
Rotation41.2±3.8 d[2]
Other designations
CD–51°10924, HIP 85647, LTT 6947/6948, NLTT 44859, NSV 8846
Database references
SIMBADdata
Exoplanet Archivedata

Gliese 676 is a 10th-magnitude wide binary system of red dwarfs that has an estimated minimum separation of 800 AU with an orbital period of greater than 20,000 years.[6] It is located approximately 54 light years away in the constellation Ara. In 2009, a gas giant was found in orbit around the primary star, in addition to its confirmation in 2011 there was also a strong indication of a companion; the second gas giant was characterised in 2012, along with two much smaller planets.

  1. ^ a b Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference mnras452_3_2745 was invoked but never defined (see the help page).
  3. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  4. ^ a b c d Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Forveille2011 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference 4-planet was invoked but never defined (see the help page).