HD 85725

HD 85725
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 09h 52m 58.02763s[1]
Declination −27° 19′ 55.8219″[1]
Apparent magnitude (V) 6.28[2]
Characteristics
Spectral type G1 V[3]
B−V color index +0.62[4]
Astrometry
Radial velocity (Rv)61.6±0.1[5] km/s
Proper motion (μ) RA: −278.245 mas/yr[1]
Dec.: +95.043 mas/yr[1]
Parallax (π)18.5634 ± 0.0256 mas
Distance175.7 ± 0.2 ly
(53.87 ± 0.07 pc)
Absolute magnitude (MV)+2.68[2]
Details
Mass1.42[6] M☉
Radius2.59±0.11[7] R☉
Luminosity7.58[8] L☉
Surface gravity (log g)3.86[9] cgs
Temperature5,940±110[7] K
Metallicity [Fe/H]+0.15[10] dex
Rotational velocity (v sin i)5.9±0.3[11] km/s
Age2.75[6] Gyr
Other designations
33 G. Antliae, CD−26° 7505, CPD−26°4079, HIP 48468, HR 3916, SAO 178130, WDS J09530-2720A[12]
Database references
SIMBADdata

HD 85725, also known as HR 3916, is a yellow hued star located in the southern constellation Antlia. It has an apparent magnitude of 6.29,[2] placing it near the limit for naked eye visibility. The object is relatively close at a distance of 176 light-years,[1] but is receding with a heliocentric radial velocity of 61.6 km/s.[5]

HD 85725 has a stellar classification of G1 V,[3] which indicates that it is an ordinary G-type main-sequence star that is fusing hydrogen at its core. However, a low surface gravity of 7244 cm/s2[9] suggests that the object is instead an evolved subgiant.

At present it has 143%[6] the mass of the Sun but is 2.59 times larger,[7] which is not characteristic of a yellow dwarf. It shines at 7.6[8] times the luminosity of the Sun from its photosphere at a surface temperature of 5,940 K,[7] which gives it a yellow glow. At an age of 2.75 billion years,[6] HD 85725 is spinning leisurely with a projected rotational velocity of 5.9 km/s.[11]

There is a 10th magnitude companion located 1.5″ away along a position angle of 25°. It appears to have a common proper motion with the star, suggesting physical relation.[13]

  1. ^ a b c d Cite error: The named reference GaiaEDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 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. ^ Cite error: The named reference EgUBV was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Nidever2002 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference BASTI was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference CostaSilva2020 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Delgado Mena2021 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Saar1997 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Mason2001 was invoked but never defined (see the help page).