| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra [note 1] |
| Right ascension | 08h 53m 36.16047s [2] |
| Declination | −03° 29′ 32.1975″ [2] |
| Apparent magnitude (V) | +18.959 [3] |
| Characteristics | |
| Evolutionary stage | Ultracool dwarf [4] [5] |
| Spectral type | M9V [4] |
| Variable type | Flare star [5] |
| Astrometry | |
| Radial velocity (Rv) | 7±2 [3] km/s |
| Proper motion (μ) | RA: −516.605 mas/yr [2] Dec.: −199.652 mas/yr [2] |
| Parallax (π) | 115.4876±0.0726 mas [2] |
| Distance | 28.24 ± 0.02 ly (8.659 ± 0.005 pc) |
| Details | |
| Mass | 0.082±0.002 [6] M☉ |
| Radius | 0.113±0.006 [6] R☉ |
| Luminosity | 3.39+0.16 −0.15×10−4 [7] L☉ |
| Surface gravity (log g) | ~5.5 [7] cgs |
| Temperature | 2,317+61 −56 [6] K |
| Age | >0.5 [5] Gyr |
| Other designations | |
| GJ 3517, LHS 2065, LP 666-9, TIC 7975441, 2MASS J08533619-0329321 | |
| Database references | |
| SIMBAD | data |
LHS 2065 is a red dwarf star, one of the smallest stars ever found with around 8.2% the mass of the Sun and a diameter only 10% greater than Jupiter. [6] It is one of the few ultracool dwarfs known to have flare activity, emitting one flare every 33 hours, [5] and is also an active X-ray emitter. [4]
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Parallax measurements by the Gaia spacecraft give a distance of 8.66 parsecs (28.2 ly) to LHS 2065. [2] This star was first recorded by the Luyten Half-Second catalogue, a catalogue of stars with proper motions exceeding 0.5". The star's main identifier is named after this catalogue. [8] It is located in the Hydra constellation. [note 1]
This star has a spectral type of M9V, [4] indicating a very cool star at the end of the main sequence. It is among the nearest ultracool dwarfs to Earth. [5] LHS 2065 has an effective temperature of around 2,317 K, [6] 2.5 times less than the Sun. The lack of lithium in the star's atmosphere indicate that it must be over 500 million years old. [5]
