Gliese 408

Gliese 408 is a star located 21.6 light years from the Solar System, located in the constellation of Leo. The stars nearest to Gliese 408 are Gliese 402, at 6.26 light years, and AD Leonis, at 6.26 light years.[9]

Gliese 408
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Right ascension 10h 00m 04.25686s[1]
Declination +22° 49′ 58.6491″[1]
Apparent magnitude (V) 10.020[2]
Characteristics
Spectral type M2.5V[3]
U−B color index +1.22[4]
B−V color index +1.55[4]
V−R color index +1.08[4]
R−I color index +1.31[4]
Astrometry
Radial velocity (Rv)3.15[5] km/s
Proper motion (μ) RA: -427.01[1] mas/yr
Dec.: -281.82[1] mas/yr
Parallax (π)148.1986 ± 0.0253 mas[6]
Distance22.008 ± 0.004 ly
(6.748 ± 0.001 pc)
Absolute magnitude (MV)10.82[4]
Details
Mass0.406 ± 0.007[7] M☉
Radius0.43[8] R☉
Luminosity (visual, LV)0.0037[9] L☉
Surface gravity (log g)5.0[3] cgs
Temperature3530[3] K
Metallicity [Fe/H]-0.14[7] dex
Rotational velocity (v sin i)<2.3[7] km/s
Other designations
HIP 53767, Gliese 408, LTT 12942, LHS 6193, Ross 104
Database references
SIMBADdata
ARICNSdata

Gliese 408 is a red dwarf with a spectral type of M2.5V.[3] Much dimmer than the Sun, it has a luminosity of only 0.37% compared to the Sun,[9] but still it is much more luminous than other red dwarf stars, like Proxima Centauri. Its effective temperature is about 3400 to 3500 K;[3] its mass is about 41% compared to the Sun,[7] and its radius is about 43% that of the Sun.[8] Its rotational velocity is at most 2.3 km/s. No evidence of a circumstellar disk has been found around Gliese 408.[10]

References
  1. van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  2. "GJ 408". SIMBAD. Centre de données astronomiques de Strasbourg.
  3. Lépine, Sébastien; et al. (2013). "A Spectroscopic Catalog of the Brightest (J < 9) M Dwarfs in the Northern Sky". The Astronomical Journal. 145 (4): 102. arXiv:1206.5991. Bibcode:2013AJ....145..102L. doi:10.1088/0004-6256/145/4/102. S2CID 117144290.
  4. "ARICNS 4C00834". ARICNS. Retrieved 23 January 2017.
  5. Nidever, David L.; et al. (2013). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series. 141 (2): 503–522. arXiv:astro-ph/0112477. Bibcode:2002ApJS..141..503N. doi:10.1086/340570. S2CID 51814894.
  6. 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.
  7. Jenkins, J. S.; Ramsey, L. W.; Jones, H. R. A.; Pavlenko, Y.; Gallardo, J.; Barnes, J. R.; Pinfield, D. J. (2009). "Rotational Velocities for M Dwarfs". The Astrophysical Journal. 704 (2): 975–988. arXiv:0908.4092. Bibcode:2009ApJ...704..975J. doi:10.1088/0004-637X/704/2/975. S2CID 119203469.
  8. Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics. 367 (2): 521–24. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. S2CID 425754.
  9. "Catalogue Astrographique +23°468-46". The Internet Stellar Database.
  10. Lestrade, J.-F.; Wyatt, M. C.; Bertoldi, F.; Dent, W. R. F.; Menten, K. M. (2006). "Search for cold debris disks around M-dwarfs". Astronomy and Astrophysics. 460 (3): 773–741. arXiv:astro-ph/0609574. Bibcode:2006A&A...460..733L. doi:10.1051/0004-6361:20065873. S2CID 119328045.
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