LHS 2065

LHS 2065
Observation data
Epoch J2000      Equinox J2000
Constellation Hydra[note 1]
Right ascension 08h 53m 36.16047s[1]
Declination −03° 29′ 32.1975″[1]
Apparent magnitude (V) +18.959[2]
Characteristics
Evolutionary stage Ultracool dwarf[3][4]
Spectral type M9V[3]
Variable type Flare star[4]
Astrometry
Radial velocity (Rv)7±2[2] km/s
Proper motion (μ) RA: −516.605 mas/yr[1]
Dec.: −199.652 mas/yr[1]
Parallax (π)115.4876 ± 0.0726 mas[1]
Distance28.24 ± 0.02 ly
(8.659 ± 0.005 pc)
Details
Mass0.082±0.002[5] M☉
Radius0.113±0.006[5] R☉
Luminosity3.39+0.16
−0.15×10−4[6] L☉
Surface gravity (log g)~5.5[6] cgs
Temperature2,317+61
−56[5] K
Age>0.5[4] Gyr
Other designations
GJ 3517, LHS 2065, LP 666-9, TIC 7975441, 2MASS J08533619-0329321
Database references
SIMBADdata

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.[5] It is one of the few ultracool dwarfs known to have flare activity, emmiting one flare every 33 hours,[4] and is also an active X-ray emitter.[3]

Parallax measurements by the Gaia spacecraft give a distance of 8.66 parsecs (28.2 ly) to LHS 2065.[1] This star was first recorded by the Luyten Half-Second catalogue, a catalogue of stars with proper motions exceding 0.5". The star's main identifier is named after this catalogue.[7] It is located in the Hydra constellation.[a]

This star has a spectral type of M9V,[3] indicating a very cool star at the end of the main sequence. It is among the nearest ultracool dwarfs to Earth.[4] LHS 2065 has an effective temperature of around 2,317 K,[5] 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.[4]

  1. ^ a b c d e f Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference robrade was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference martin2001 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference sanghi was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference LHS was invoked but never defined (see the help page).


Cite error: There are <ref group=note> tags on this page, but the references will not show without a {{reflist|group=note}} template (see the help page).
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).