23 Leonis Minoris

23 Leonis Minoris
Location of 23 LMi (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo Minor
Right ascension 10h 16m 14.43013s[1]
Declination +29° 18′ 37.7075″[1]
Apparent magnitude (V) 5.49±0.01[2]
Characteristics
Evolutionary stage main sequence star[3]
Spectral type A0 Vn[4]
U−B color index 0.00[5]
B−V color index +0.01[5]
Astrometry
Radial velocity (Rv)16.4±2.8[6] km/s
Proper motion (μ) RA: −70.765 mas/yr[1]
Dec.: −22.844 mas/yr[1]
Parallax (π)11.6971 ± 0.0923 mas[1]
Distance279 ± 2 ly
(85.5 ± 0.7 pc)
Absolute magnitude (MV)+0.98[7]
Details
Mass2.55[8] M☉
Radius2.38±0.23[9] R☉
Luminosity44.3±2.1[3] L☉
Surface gravity (log g)4.14±0.07[10] cgs
Temperature10,377±353[8] K
Metallicity [Fe/H]0.00[11] dex
Rotational velocity (v sin i)235±15[12] km/s
Age285+24
−22[13] Myr
Other designations
7 H. Leonis Minoris,[14] 23 LMi, AG+29°1104, BD+30°1981, FK5 2823, GC 14086, HD 88960, HIP 50303, HR 4024, SAO 81258[15]
Database references
SIMBADdata

23 Leonis Minoris (23 LMi) is a solitary,[16] bluish-white hued star located in the northern constellation Leo Minor. It is positioned 7° south and 11" west from β Leonis Minoris. It is rarely called 7 H. Leonis Minoris, which is its Hevelius designation.[14]

The object has an apparent magnitude of 5.49, allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia satellite, it is estimated to be 279 light years distant. 23 LMi is receding from the Solar System with a fairly constrained radial velocity of 16 km/s.[citation needed] At its current distance, the star's brightness is diminished by a tenth of a magnitude due to interstellar dust.[17] 23 LMi's kinematics matches that of the Hyades moving group and it is considered a probable member.[18]

23 LMi was catalogued as a chemically peculiar star with a stellar classification of A0 Vpn due to a lack of magnesium in its spectrum by Helmut Abt and Nidia Irene Morrell.[12] However, A.P. Cowley and colleagues instead listed it as an ordinary A-type main-sequence star with nebulous absorption lines as a result of rapid rotation, with the class being A0 Vn.[4] It has 2.55 times the mass of the Sun[8] and is said to be 285 million years old,[13] having completed 60.8% of its main sequence lifetime.[3] It has double the radius of the Sun[9] and shines with a luminosity 44.3 times that of the Sun[3] from its photosphere at an effective temperature of 10,377 K.[8] 42 LMi is currently spinning rapidly with a projected rotational velocity of 235 km/s.[12]

  1. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c d 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 Cite error: The named reference Oja1983 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference XHIP was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Stassun2018 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference AP1999 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  12. ^ a b c Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference Grosbol1978 was invoked but never defined (see the help page).
  14. ^ a b Cite error: The named reference Verbunt2010 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).