HD 88809

HD 88809
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 10h 13m 45.9269s[1]
Declination −40° 20′ 45.6832″[1]
Apparent magnitude (V) 5.893±0.009[2]
Characteristics
Spectral type K1 III[3]
U−B color index +1.25[4]
B−V color index +1.21[4]
Astrometry
Radial velocity (Rv)19.96±0.76[1] km/s
Proper motion (μ) RA: −79.460[1] mas/yr
Dec.: +2.511[1] mas/yr
Parallax (π)7.2269 ± 0.0909 mas[1]
Distance451 ± 6 ly
(138 ± 2 pc)
Absolute magnitude (MV)+0.19
Details[5]
Mass1.29+1.20
−0.4 M☉
Radius17.07[6] R☉
Luminosity117±8 L☉
Temperature4,410±110 K
Metallicity [Fe/H]−0.2 dex
Rotational velocity (v sin i)<1.3[7] km/s
Age4.9[8] Gyr
Position (relative to HD 88809A)[9]
ComponentHD 88809B
Epoch of observationJ2000.0
Angular distance4.9″
Position angle105°
Projected separation676.2 AU
Other designations
55 G. Antliae, CD−39° 6222, HD 88809, HIP 50103, HR 4015, SAO 22187
Database references
SIMBADdata

HD 88809 is a star located in the southern constellation Antlia. With an apparent magnitude of 5.89[2] it is barely visible to the naked eye under ideal conditions. The star is located at a distance of around 451 light years[1] but is drifting away at a heliocentric radial velocity of almost 20 km/s.[1]

HD 88809 has a classification of K1 III[3] which indicates that it is an evolved early K-type giant star that has exhausted hydrogen at its core and left the main sequence. It has an angular diameter of 1.15 mas,[10] which yields a diameter of 17.07[6] times that of the Sun at its estimated distance. At present HD 88809 has 129%[5] the mass of the Sun and shines with a luminosity approximately 117[5] times that of the Sun and has a surface temperature of 4,410 K,[5] which gives it an orange glow of a K-type star. HD 88809 has a faint 13th magnitude companion located approximately 4.9″ away.[9]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Charbonnel2020 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Lang2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference DeMederios2014 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference DDR was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Mason2001 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Stassun2017 was invoked but never defined (see the help page).