LHS 1140
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. 'LHS' refers to the Luyten Half-Second Catalogue of stars with proper motions exceeding half a second of arc annually. The star is over 5 billion years old and has only about 18% the mass of the Sun and 21% of its radius. LHS 1140's rotational period is 130 days. No flares have been observed.
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 |
| Declination | −15° 16′ 17.5428″ |
| Apparent magnitude (V) | 14.18 |
| Characteristics | |
| Evolutionary stage | Red dwarf |
| Spectral type | M4.5V |
| Astrometry | |
| Radial velocity (Rv) | −13.74±0.42 km/s |
| Proper motion (μ) | RA: 318.152 mas/yr Dec.: −596.623 mas/yr |
| Parallax (π) | 66.8287 ± 0.0479 mas |
| Distance | 48.80 ± 0.03 ly (14.96 ± 0.01 pc) |
| Details | |
| Mass | 0.1844±0.0045 M☉ |
| Radius | 0.2159±0.0030 R☉ |
| Luminosity | 0.0038±0.0003 L☉ |
| Surface gravity (log g) | 5.041±0.016 cgs |
| Temperature | 3,096±48 K |
| Metallicity [Fe/H] | −0.15±0.09 dex |
| Rotation | 131±5 d |
| Age | >5 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
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