Astronomy:Gliese 408
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Short description: Star in the constellation Leo
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 00m 04.25701s[1] |
| Declination | +22° 49′ 58.6450″[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) | 2.65±0.14[1] km/s |
| Proper motion (μ) | RA: -426.958[1] mas/yr Dec.: -282.298[1] mas/yr |
| Parallax (π) | 148.1986 ± 0.0253[1] mas |
| Distance | 22.008 ± 0.004 ly (6.748 ± 0.001 pc) |
| Absolute magnitude (MV) | 10.82[4] |
| Details | |
| Mass | 0.406 ± 0.007[5] M☉ |
| Radius | 0.43[6] R☉ |
| Luminosity (visual, LV) | 0.0037[7] L☉ |
| Surface gravity (log g) | 5.0[3] cgs |
| Temperature | 3530[3] K |
| Metallicity [Fe/H] | -0.14[5] dex |
| Rotational velocity (v sin i) | <2.3[5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 408 is a star located 22.0 light-years (6.7 parsecs) 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.[7]
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,[7] 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,[5] and its radius is about 43% that of the Sun.[6] Its rotational velocity is at most 2.3 km/s. No evidence of a circumstellar disk has been found around Gliese 408.[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 "GJ 408". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+408.
- ↑ 3.0 3.1 3.2 3.3 3.4 Lépine, Sébastien (2013). "A Spectroscopic Catalog of the Brightest (J < 9) M Dwarfs in the Northern Sky". The Astronomical Journal 145 (4): 102. doi:10.1088/0004-6256/145/4/102. Bibcode: 2013AJ....145..102L.
- ↑ 4.0 4.1 4.2 4.3 4.4 "ARICNS 4C00834". ARICNS. http://wwwadd.zah.uni-heidelberg.de/datenbanken/aricns/cnspages/4c00834.htm. Retrieved 23 January 2017.
- ↑ 5.0 5.1 5.2 5.3 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. doi:10.1088/0004-637X/704/2/975. Bibcode: 2009ApJ...704..975J.
- ↑ 6.0 6.1 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. doi:10.1051/0004-6361:20000451. Bibcode: 2001A&A...367..521P.
- ↑ 7.0 7.1 7.2 "Catalogue Astrographique +23°468-46". The Internet Stellar Database. http://www.stellar-database.com/Scripts/search_star.exe?Catalog=Gl&CatNo=408.
- ↑ 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. doi:10.1051/0004-6361:20065873. Bibcode: 2006A&A...460..733L.
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