Gliese 829

Gliese 829
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pegasus
Right ascension 21h 29m 36.81225s[1]
Declination +17° 38′ 35.8542″[1]
Apparent magnitude (V) 10.35[2]
Characteristics
Spectral type M3.0Ve[3]
U−B color index +1.31[2]
B−V color index +1.61[2]
Astrometry
Radial velocity (Rv)−25.0[4] km/s
Proper motion (μ) RA: +1007.13[1] mas/yr
Dec.: +377.27[1] mas/yr
Parallax (π)147.4958 ± 0.0257 mas[5]
Distance22.113 ± 0.004 ly
(6.780 ± 0.001 pc)
Orbit[6]
Period (P)53.221±0.004 d
Eccentricity (e)0.374±0.004
Periastron epoch (T)48980.2±0.2 JD
Argument of periastron (ω)
(secondary)		300±1°
Semi-amplitude (K1)
(primary)		18.7±0.1 km/s
Semi-amplitude (K2)
(secondary)		18.7±0.1 km/s
Details
Surface gravity (log g)5.0[3] cgs
Temperature3,400[3] K
Metallicity [Fe/H]−0.13[7] dex
Other designations
HIP 106106, Ross 775.[8]
Database references
SIMBADdata
ARICNSdata

Gliese 829 is a double-lined spectroscopic binary[6] system of two red dwarf stars in the constellation of Pegasus. They have a high proper motion of 1.08 arc seconds per year along a position angle of +69.58°.[9] Based upon parallax measurements, the stars are at a distance of about 22 light years from the Sun.[1] The system will make its closest approach to the Sun around 91,000 years from now when it achieves a perihelion distance of 17.65 ly (5.410 pc).[4]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Ianna1984 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference lepine2013 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Bailer-Jones2015 was invoked but never defined (see the help page).
  5. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  6. ^ a b Cite error: The named reference Delfosse1999 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference RojasAyala2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Dawson2005 was invoked but never defined (see the help page).