32 Leonis Minoris

32 Leonis Minoris
Location of 32 LMi on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo Minor
Right ascension 10h 30m 06.44761s[1]
Declination +38° 55′ 30.4758″[1]
Apparent magnitude (V) 5.78±0.01[2]
Characteristics
Evolutionary stage subgiant[3]
Spectral type A4 V[4] or A4 III[5]
U−B color index +0.14[5]
B−V color index +0.07[5]
Astrometry
Radial velocity (Rv)2±4.3[6] km/s
Proper motion (μ) RA: −16.446 mas/yr[1]
Dec.: −4.506 mas/yr[1]
Parallax (π)4.4749 ± 0.0527 mas[1]
Distance729 ± 9 ly
(223 ± 3 pc)
Absolute magnitude (MV)−1.02[7]
Details
Mass2.01±0.39[8] M☉
Radius6.58±0.33[9] R☉
Luminosity241+41
−35[3] L☉
Surface gravity (log g)3.07±0.37[8] cgs
Temperature8,511+79
−78[3] K
Metallicity [Fe/H]−0.80[10] dex
Rotational velocity (v sin i)70±8[11] km/s
Age465[12] Myr
Other designations
32 LMi, AG+39°1131, BD+39°2357, GC 14417, HD 90840, HIP 51420, HR 4113, SAO 62076[13]
Database references
SIMBADdata

32 Leonis Minoris (32 LMi), also known as HD 90840, is a solitary star[14] located in the northern constellation Leo Minor. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.78.[2] The object is located relatively far at a distance of 729 light-years based on Gaia DR3 parallax measurements[1] and it is currently receding with a heliocentric radial velocity of 2 km/s,[6] which is somewhat constrained. At its current distance, 32 LMi's brightness is diminished by 0.14 magnitudes due to interstellar extinction[15] and it has an absolute magnitude of −1.02.[7]

The object has been given several stellar classifications over the years, ranging from main sequence (V) to giant star (III) and A1 to A4. Two of the classifications are A4 V[4] and A4 III.[5] It has 2.01 times the mass of the Sun[8] but at the age of 465 million years,[12] 32 LMi is now on the subgiant branch[8][failed verification] and it has expanded to 6.58 times the radius of the Sun.[9] It radiates 241 times the luminosity of the Sun[3] from its photosphere at an effective temperature of 8,511 K.[3] 32 LMi is metal deficient with an iron abundance only 15.9% that of Sun ([Fe/H] = −0.80)[10] and it spins modestly with a projected rotational velocity of 70 km/s.[11]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Osawa1959 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Stassun2018 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2022 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).