HD 88231

HD 88231
Location of HD 88231 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo Minor
Right ascension 10h 11m 12.77777s[1]
Declination +37° 24′ 06.8383″[1]
Apparent magnitude (V) 5.84[2] (5.79 - 5.88)[3]
Characteristics
Spectral type K3 III[4]
B−V color index +1.29[5]
Variable type suspected[6]
Astrometry
Radial velocity (Rv)7.38±0.22[7] km/s
Proper motion (μ) RA: −20.679 mas/yr[1]
Dec.: −29.496 mas/yr[1]
Parallax (π)5.7353 ± 0.0663 mas[1]
Distance569 ± 7 ly
(174 ± 2 pc)
Absolute magnitude (MV)−0.59[8]
Details
Mass1.17[9] M☉
Radius24.9±1.3[10] R☉
Luminosity228±5[1] L☉
Surface gravity (log g)1.76+0.10
−0.06[11] cgs
Temperature4,487±122[12] K
Metallicity [Fe/H]+0.05[9] dex
Other designations
NSV 4764, AG+37°1046, BD+38°2110, FK5 2817, GC 13985, HD 88231, HIP 49893, HR 3993, SAO 61914[13]
Database references
SIMBADdata

HD 88231, also known as HR 3993, is a solitary orange-hued star located in the northern constellation Leo Minor. It has an apparent magnitude of 5.84,[2] making it faintly visible to the naked eye under ideal conditions. Gaia DR3 parallax measurements imply a distance of about 569 light-years,[1] and the object is currently receding with a heliocentric radial velocity of 7.38 km/s.[7] At its current distance, HD 88231's brightness is diminished by 0.17 magnitudes due to interstellar extinction[14] and it has an absolute magnitude of −0.59.[8]

The object has a stellar classification of K3 III,[4] indicating that it is an evolved red giant star. It has a comparable mass to the Sun[9] but it has expanded to 24.9 times the radius of the Sun.[10] It radiates 228 times the luminosity of the Sun[1] from its enlarged photosphere at an effective temperature of 4,487 K.[12] HD 88231 is slightly metal enriched with an iron abundance 112% that of the Sun ([Fe/H] = +0.05).[9]

HD 88231 was suspected to be variable in the K-band based on Two-Micron Sky Survey observations in 1969.[15] A 1994 paper found that it ranges from 5.79 to 5.88 in the visual band.[3] As of 2004 however, the variability has not been confirmed.[16]

  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 Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Percy1994 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Wilson1950 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Haggkvist1970 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Takagi2010 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 Gontcharov2017 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Neugebauer1969 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Samus2004 was invoked but never defined (see the help page).