LHS 1140

LHS 1140

Artist's impression of LHS 1140 and LHS 1140b.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cetus
Right ascension 00h 44m 59.33091s[1]
Declination −15° 16′ 17.5428″[1]
Apparent magnitude (V) 14.18[2]
Characteristics
Evolutionary stage Red dwarf
Spectral type M4.5V[2]
Astrometry
Radial velocity (Rv)−13.74±0.42[1] km/s
Proper motion (μ) RA: 318.152 mas/yr[1]
Dec.: −596.623 mas/yr[1]
Parallax (π)66.8287 ± 0.0479 mas[1]
Distance48.80 ± 0.03 ly
(14.96 ± 0.01 pc)
Details[3]
Mass0.1844±0.0045 M☉
Radius0.2159±0.0030 R☉
Luminosity0.0038±0.0003 L☉
Surface gravity (log g)5.041±0.016 cgs
Temperature3,096±48 K
Metallicity [Fe/H]−0.15±0.09 dex
Rotation131±5 d
Age>5 Gyr
Other designations
GJ 3053, G 270-58, G 268-38, LHS 1140, NLTT 2465, TOI-256, TIC 92226327, 2MASS J00445930-1516166[4]
Database references
SIMBADdata
ARICNSdata

LHS 1140 is a red dwarf in the constellation of Cetus. Based on stellar parallax measurement, it is 48.8 light-years (15.0 parsecs) away from the Sun.[1] 'LHS' refers to the Luyten Half-Second Catalogue of stars with proper motions exceeding half a second of arc annually.[5] The star is over 5 billion years old and has only about 18% the mass of the Sun and 21% of its radius.[6] LHS 1140's rotational period is 130 days. No flares have been observed.[7]

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference NAT-20170419 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Cadieux2023 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  5. ^ Luyten, Willem Jacob (1979). Catalogue of stars with proper motions exceeding 0.5" annually. University of Minnesota Press.
  6. ^ Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference ST-20170419 was invoked but never defined (see the help page).