HD 92589

HD 92589
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Antlia
Right ascension 10h 40m 51.5391s[1]
Declination −35° 44′ 30.1761″[1]
Apparent magnitude (V) 6.39±0.01[2]
Characteristics
Spectral type G8/K0 III + F/G[3]
U−B color index +0.02[4]
B−V color index +0.92[4]
Astrometry
Radial velocity (Rv)11±5.4[5] km/s
Proper motion (μ) RA: −25.072 mas/yr[1]
Dec.: +5.872 mas/yr[1]
Parallax (π)5.5014 ± 0.1586 mas[1]
Distance590 ± 20 ly
(182 ± 5 pc)
Absolute magnitude (MV)−0.78[6]
Details
A
Mass2.3[7] M☉
Radius13.07[8] R☉
Luminosity141[1] L☉
Surface gravity (log g)2.54[7] cgs
Temperature5,171±122[9] K
Metallicity [Fe/H]−0.29[10] dex
Rotational velocity (v sin i)1.6±1.2[11] km/s
B
Mass2.96[12] M☉
Other designations
76 G. Antliae, CD−35° 6646, CPD−35° 4320, FK5 2586, HD 92589, HIP 52273, HR 4183, SAO 201631, WDS J10409-3545
Database references
SIMBADdata

HD 92589 (HR 4183) is a double star in the constellation Antlia. The system has a combined apparent magnitude of 6.39,[2] placing it near the limit of naked eye visibility. The system is located about 590 light years[1] away based on its parallax shift and has a heliocentric radial velocity of 11 km/s.[5] This indicates that it is drifting away from the Solar System.

The system has a composite stellar classification of G8/K0 III + F/G.[3] This indicates that the primary spectrum intermediate between a G8 and K0 giant star while the companion is probably a F-type or G-type star. As of 1991, the pair have a projected separation of 700 mas along a position angle of 48°.[13] Both stars take 1,591 years to orbit each other.[13][12]

At present the visible component has 2.3 times the mass of the Sun[7] but has expanded to 13.07[8] times its girth. It shines with a luminosity 141[1] times greater than the Sun from its enlarged photosphere at an effective temperature of 5,171 K,[9] which gives the yellow hue of a G-type star. HD 92589A is metal-deficient, with an iron abundance only 51%[10] that of the Sun and spins leisurely with a projected rotational velocity of 1.6 km/s,[11] common for giant stars.

  1. ^ a b c d e f g Cite error: The named reference EDR3 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 Houk1982 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Deutscman1976 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Karchenko2007 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Anders2022 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Stassun2019 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 DeMederios2014 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Tokovinin2018 was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference Mason2001 was invoked but never defined (see the help page).