GJ 3512

GJ 3512
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 08h 41m 20.12866s[1]
Declination +59° 29′ 50.4441″[1]
Apparent magnitude (V) +15.05[2]
Characteristics
Evolutionary stage Main sequence
Spectral type dM5.5[3]
Astrometry
Radial velocity (Rv)+7.13±2.45[1] km/s
Proper motion (μ) RA: −260.276 mas/yr[1]
Dec.: −1,279.562 mas/yr[1]
Parallax (π)105.2935 ± 0.0313 mas[1]
Distance30.976 ± 0.009 ly
(9.497 ± 0.003 pc)
Details[3]
Mass0.1254±0.0031 M☉
Radius0.1636±0.0023 R☉
Luminosity0.001574±0.000018 L☉
Surface gravity (log g)5.240±0.044 cgs
Temperature3,081±51 K
Metallicity [Fe/H]−0.07±0.16 dex
Rotation87±5 d[4]
Rotational velocity (v sin i)2.0[5] km/s
Age3–8[6] Gyr
Other designations
G 234-45, LHS 252, LP 90-18, 2MASS J08412013+5929505[7]
Database references
SIMBADdata

GJ 3512 is a nearby star in the northern circumpolar constellation of Ursa Major. It is invisible to the naked eye but can be observed using a telescope, having an apparent visual magnitude of +15.05.[2] The star is located at a distance of 31 light-years from the Sun based on parallax.[1] It has a high proper motion,[6] traversing the celestial sphere at the rate of 1.311″ yr−1.[8] The measurement of the star's radial velocity is poorly constrained, but it appears to be drifting further away at a rate of ~8 km/s.[9]

The stellar classification of GJ 3512 is dM5.5,[3] which determines this to be a small red dwarf star that is generating energy through core hydrogen fusion. It displays a moderate amount of magnetic activity with a Sun-like cycle lasting 14 years. A low-level variability lasting ~87 d matches the approximate rotation period.[4] The star has 12.5% of the mass of the Sun and 16% of the Sun's radius. It is radiating 1.6% of the luminosity of the Sun from its photosphere at an effective temperature of 3,081 K.[3]

  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 weis1996 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Schweitzer_et_al_2019 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Lopez_et_al_2020 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference reiners_et_al_2018 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Morales_et_al_2019 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Lepine_Shara_2005 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference newton_et_al_2014 was invoked but never defined (see the help page).