Gliese 1

Gliese 1
Observation data
Epoch J2000      Equinox J2000
Constellation Sculptor
Right ascension 00h 05m 24.4279s[1]
Declination −37° 21′ 26.503″[1]
Apparent magnitude (V) 8.57[2]
Characteristics
Spectral type M2V[3]
U−B color index +1.04[4]
B−V color index +1.46[4]
Variable type BY Dra[5]
Astrometry
Radial velocity (Rv)+23.6±2[6] km/s
Proper motion (μ) RA: +5,633.95[1] mas/yr
Dec.: −2,336.69[1] mas/yr
Parallax (π)230.0970 ± 0.0362 mas[7]
Distance14.175 ± 0.002 ly
(4.3460 ± 0.0007 pc)
Absolute magnitude (MV)10.35[8]
Details
Mass0.33±0.07[9] M☉
Radius0.33±0.06[9] R☉
Luminosity0.015+0.007
−0.005[9] L☉
Surface gravity (log g)4.91[9] cgs
Temperature3,478±68[9] K
Metallicity [Fe/H]−0.26±0.09[9] dex
Rotation60.1±5.7 d[10]
Rotational velocity (v sin i)4.8[11] km/s
Age8.27[9] Gyr
Other designations
CD−37°15492, CPD−37°9435, G 267-025, GJ 1, GC 49, GCTP 5817.00, HD 225213, HIP 439, LHS 1, LTT 23, NLTT 134, NSV 15017, SAO 192348[2]
Database references
SIMBADdata
Gliese 1 is located in the constellation Sculptor.
Gliese 1 is located in the constellation Sculptor.
Gliese 1
Location of Gliese 1 in the constellation Sculptor

Gliese 1 is a red dwarf in the constellation Sculptor, which is found in the southern celestial hemisphere. It is one of the closest stars to the Sun, at a distance of 14.2 light years. Because of its proximity to the Earth it is a frequent object of study and much is known about its physical properties and composition. However, with an apparent magnitude of about 8.6 it is too faint to be seen with the naked eye.

  1. ^ a b c d Cite error: The named reference hipparcos was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference houk1982 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference MNRAS32 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference GCVS was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference rv was invoked but never defined (see the help page).
  7. ^ 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.
  8. ^ Cite error: The named reference Liefke was invoked but never defined (see the help page).
  9. ^ a b c d e f g Cite error: The named reference maldonado2020 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference mnras452_3_2745 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference aaa493_3_1099 was invoked but never defined (see the help page).