LHS 2924
Red dwarf star in the constellation Boötes
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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.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas/yr[2] Dec.: -710.986 mas/yr[2] |
| Parallax (π) | 91.1634±0.0994 mas[2] |
| 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 | |
| GJ 3849, LHS 2924, LP 271-25, LSPM J1428+3310, NLTT 37480, TIC 286963145, 2MASS J14284323+3310391, WISEA J142842.93+331031.7, SDSS J142843.13+331036.8, FS 134[4] | |
| Database references | |
| SIMBAD | data |