Astronomy:LHS 2924
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Short description: Red dwarf star in the constellation Boötes
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 14h 28m 43.2275s[2] |
| Declination | +33° 10′ 39.259″[2] |
| Apparent magnitude (V) | 19.35[3] |
| Characteristics | |
| Spectral type | M9Ve[4] |
| Apparent magnitude (B) | 21.2[4] |
| Apparent magnitude (R) | 17.8[4] |
| Apparent magnitude (J) | 11.99[4] |
| Apparent magnitude (H) | 11.225[4] |
| Apparent magnitude (K) | 10.744[4] |
| Astrometry | |
| Radial velocity (Rv) | -39.14[4] km/s |
| Proper motion (μ) | RA: -346.961[2] mas/yr Dec.: -710.986[2] mas/yr |
| Parallax (π) | 91.1634 ± 0.0994[2] mas |
| Distance | 35.78 ± 0.04 ly (10.97 ± 0.01 pc) |
| Absolute magnitude (MV) | 19.15 |
| Details[5] | |
| Mass | 0.08 M☉ |
| Radius | 0.107 R☉ |
| Luminosity (bolometric) | ~0.00021 L☉ |
| Luminosity (visual, LV) | 0.0000016 L☉ |
| Temperature | 2130 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
LHS 2924, also commonly known as LP 271-25, is an extremely small and dim ultra-cool red dwarf located in the constellation of Boötes, about 35.78 light-years from the Sun. It is very challenging to see LHS 2924 from Earth, because it is so extremely faint, having an apparent magnitude in the visible spectrum of only +19.35. Due to its faintness, it was only discovered in 1983, and it was the least massive star known at the time of its discovery,[3] being smaller and less luminous than VB 10, which was before LHS 2924’s discovery the least massive and luminous star known. LHS 2924 is the primary standard for the M9V spectral class.
See also
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 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.
- ↑ 3.0 3.1 Probst, R. G.; Liebert, J. (1983-11-01). "LHS 2924 : A uniquely cool low-luminosity star with a peculiar energy distribution.". The Astrophysical Journal 274: 245–251. doi:10.1086/161442. ISSN 0004-637X. Bibcode: 1983ApJ...274..245P. https://ui.adsabs.harvard.edu/abs/1983ApJ...274..245P.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 "LP 271-25". http://simbad.u-strasbg.fr/simbad/sim-id.
- ↑ Tsuji, Takashi; Nakajima, Tadashi (2016-02-01). "Near-infrared spectroscopy of M dwarfs. III. Carbon and oxygen abundances in late M dwarfs, including the dusty rapid rotator 2MASSI J1835379+325954†". Publications of the Astronomical Society of Japan 68 (1): 13. doi:10.1093/pasj/psv119. ISSN 0004-6264. Bibcode: 2016PASJ...68...13T.
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