Back Gliese 251 AST Gliese 251 Spanish グリーゼ251 Japanese Gliese 251 Dutch HD 265866 Russian Gliese 251 Swedish கிளீசே 251 Tamil 格利泽251 Chinese
  Gliese 251 Location of Gliese 251 in the constellation Gemini | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Gemini |
| Right ascension | 06h 54m 48.95806s[1] |
| Declination | +33° 16′ 05.4383″[1] |
| Apparent magnitude (V) | +10.11[2] |
| Characteristics | |
| Spectral type | M3.0Ve[3] |
| U−B color index | +1.20[4] |
| B−V color index | +1.60[4] |
| Astrometry | |
| Radial velocity (Rv) | 22.30±0.19[1] km/s |
| Proper motion (μ) | RA: -726.672 mas/yr[1] Dec.: -398.102 mas/yr[1] |
| Parallax (π) | 179.0629±0.0280 mas[1] |
| Distance | 18.215 ± 0.003 ly (5.5846 ± 0.0009 pc) |
| Absolute magnitude (MV) | 11.23[5] |
| Details | |
| Mass | 0.360±0.015[6] M☉ |
| Radius | 0.364±0.011[6] R☉ |
| Luminosity | 0.01691±0.00028[7] L☉ |
| Surface gravity (log g) | 4.96±0.07[7] cgs |
| Temperature | 3451±51[7] K |
| Metallicity [Fe/H] | -0.03±0.16[7] dex |
| Rotation | 122.1+1.9 −2.2 d[6] |
| Rotational velocity (v sin i) | ≤2[6] km/s |
| Other designations | |
| GJ 251, HD 265866, HIP 33226, LHS 1879, LTT 11941, Wolf 294, 2MASS J06544902+3316058[8] | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 251, also known as HIP 33226 or HD 265866, is a star located 18.2 light-years away from the Solar System. Located in the constellation of Gemini, it is the nearest star in this constellation.[9]: 84 It is located near the boundary with Auriga, 49 arcminutes away from the bright star Theta Geminorum; due to its apparent magnitude of +9.89 it cannot be observed with the naked eye.[2] The closest star to Gliese 251 is QY Aurigae, which is located 3.5 light years away.[10]
Gliese 251 is a red dwarf with a spectral type of M3V[3] with an effective temperature of about 3300 K.[3] Its mass has been measured to be around 0.36 solar masses[6] and its radius is about 36% solar radii.[6] Its metallicity is likely slightly less than that of the Sun.[7] Observations at infrared wavelengths rule out the presence of a circumstellar disk around it.[11]
- ^ a b c d e Cite error: The named reference
GaiaDR3was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
TYC2was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
Lepinewas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
UBVwas invoked but never defined (see the help page). - ^ Cite error: The named reference
ARICNSwas invoked but never defined (see the help page). - ^ a b c d e f Cite error: The named reference
Stock2020was invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
2019A&A...625A..68Swas invoked but never defined (see the help page). - ^ "GJ 251". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 February 2017.
- ^ Cite error: The named reference
Kirkpatrick2024was invoked but never defined (see the help page). - ^ Cite error: The named reference
InternetStellarDatabase_near_Wolf_294was invoked but never defined (see the help page). - ^ Cite error: The named reference
2006ApJ...652.1674Bwas invoked but never defined (see the help page).