LHS 2924

LHS 2924 is an extremely small and dim red dwarf located in the constellation of Boötes, about 35.85 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 of +19.35. Due to its faintness, it was only discovered in 1983.[2] LHS 2924 is the primary standard for the M9V spectral class.

LHS 2924
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 28m 43.2273s[1]
Declination +33° 10′ 39.2458″[1]
Apparent magnitude (V) 19.35[2]
Characteristics
Spectral type M9Ve[1]
Apparent magnitude (B) 21.2[1]
Apparent magnitude (R) 17.8[1]
Apparent magnitude (J) 11.99[1]
Apparent magnitude (H) 11.225[1]
Apparent magnitude (K) 10.744[1]
Astrometry
Radial velocity (Rv)-39.14 [1] km/s
Proper motion (μ) RA: -346.76[1] mas/yr
Dec.: -710.107[1] mas/yr
Parallax (π)90.9962[1] ± 0.1271[1] mas
Distance35.845 ly
(10.99[1] pc)
Absolute magnitude (MV)19.15
Details[3]
Mass0.08 M☉
Radius0.103 R☉
Luminosity (bolometric)~0.00021 L☉
Luminosity (visual, LV)0.0000016 L☉
Temperature2130 K
Other designations
2MASS J14284323+3310391, LP 271-25, GJ 3849, LSPM J1428+3310
Database references
SIMBAD271-25 data

References
  1. "LP 271-25". simbad.u-strasbg.fr.
  2. Probst, R. G.; Liebert, J. (1983-11-01). "LHS 2924 : A uniquely cool low-luminosity star with a peculiar energydistribution". The Astrophysical Journal. 274: 245–251. doi:10.1086/161442. ISSN 0004-637X.
  3. 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: 13. doi:10.1093/pasj/psv119. ISSN 0004-6264.
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