Gliese 777

Gliese 777
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 20h 03m 37.405s[1]
Declination +29° 53′ 48.492″[1]
Apparent magnitude (V) +5.73[2] / +14.40
Characteristics
Spectral type G6IV[2] / M4.5V
Astrometry
Radial velocity (Rv)−45.34±0.12[1] km/s
Proper motion (μ) RA: 683.196 mas/yr[1]
Dec.: -525.501 mas/yr[1]
Parallax (π)62.4865 ± 0.34 mas[1]
Distance52.2 ± 0.3 ly
(16.00 ± 0.09 pc)[1]
Details[3]
Mass0.93±0.02 M☉
Radius1.142±0.009 R☉
Luminosity1.114±0.007 L☉
Surface gravity (log g)4.292±0.012 cgs
Temperature5,557±22 K
Metallicity [Fe/H]0.17±0.04 dex
Age4.79[2] Gyr
Other designations
Gliese 777
HD 190360: BD+29°3872, Gliese 777 A, HIP 98767, HR 7670, LHS 3510.
G 125-55: Gliese 777 B, LHS 3509.
Database references
SIMBADAB
A
B
Exoplanet Archivedata
ARICNSdata
data2

Gliese 777, often abbreviated as Gl 777 or GJ 777, is a binary star approximately 52 light-years away in the constellation of Cygnus. The system is also a binary star system made up of two stars and possibly a third. As of 2005, two extrasolar planets are known to orbit the primary star.

  1. ^ a b c d e f 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.
  2. ^ a b c Cite error: The named reference Ligi2016 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference CHARA was invoked but never defined (see the help page).