8 Leonis Minoris

8 Leonis Minoris
Location of 8 Leonis Minoris (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo Minor
Right ascension 09h 31m 32.41045s[1]
Declination +35° 06′ 11.7793″[1]
Apparent magnitude (V) 5.37[2]
Characteristics
Evolutionary stage AGB[3]
Spectral type M1 IIIab[4]
U−B color index +1.81[2]
B−V color index +1.53[2]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)39.83±0.18[6] km/s
Proper motion (μ) RA: −54.488 mas/yr[1]
Dec.: −97.434 mas/yr[1]
Parallax (π)6.6271 ± 0.0238 mas[1]
Distance492 ± 2 ly
(150.9 ± 0.5 pc)
Absolute magnitude (MV)−0.43[7]
Details
Mass1.59[8] M☉
Radius48.5[9] R☉
Luminosity417±17[10] L☉
Surface gravity (log g)1.153[11] cgs
Temperature3,978±122[12] K
Metallicity [Fe/H]−0.25[1] dex
Other designations
8 Leonis Minoris, AG+35°938, BD+35°2015, GC 13133, HD 82198, HIP 46735, HR 3769, SAO 61450[13]
Database references
SIMBADdata

8 Leonis Minoris (8 LMi) is a solitary,[14] red hued star located in the northern constellation Leo Minor. It has an apparent magnitude 5.37,[2] making it faintly visible to the naked eye. Based on parallax measurements from the Gaia satellite, the object is estimated to be 492 light years distant.[1] It is receding with a heliocentric radial velocity of 40 km/s.[6] At its current distance, 8 LMi is diminshed by 0.12 magnitudes due to interstellar dust.[15]

This is an asymptotic giant branch star[3] with stellar classification of M1 IIIab.[4] It has 1.59 times the mass of the Sun[8] but has expanded to 48.5 times its girth.[9] It radiates 417 times the luminosity of the Sun[10] from its enlarged photosphere at an effective temperature of 3,978 K.[12] 8 LMi has an iron abundance only half of the Sun's, making it metal deficient.[1]

8 LMi's variability was first observed to be variable in 1930 by Joel Stebbins.[16] However, Eggen (1967) instead lists it as an ordinary M-type giant and used the object for comparison.[17] In 1978-9, 8 LMi was again listed as a variable star but did not provide further insight.[18] As of 2017, the star has not been confirmed to be variable.[5]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Yamashita1967 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Famaey2009 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Ghosh2019 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Stassun2019 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).
  16. ^ Cite error: The named reference Stebbins1930 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Eggen1967 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Pyl'skaja1978 was invoked but never defined (see the help page).