HD 120565

HD 120565
Location of HD 120565 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 13h 42m 23.18342s[1]
Declination +82° 45′ 08.7103″[1]
Apparent magnitude (V) 5.91±0.01[2]
Characteristics
Spectral type G9 III[3]
B−V color index +1.01[4]
Astrometry
Radial velocity (Rv)−45.2±1.2[5] km/s
Proper motion (μ) RA: +29.995 mas/yr[1]
Dec.: −43.734 mas/yr[1]
Parallax (π)8.8109 ± 0.0364 mas[1]
Distance370 ± 2 ly
(113.5 ± 0.5 pc)
Absolute magnitude (MV)+0.48[6]
Details
Mass2.70±0.11[1] M☉
Radius10.8+0.3
−0.2[7] R☉
Luminosity64.1±0.5[1] L☉
Surface gravity (log g)2.47[8] cgs
Temperature4,993±122[9] K
Metallicity [Fe/H]−0.20[10] dex
Rotational velocity (v sin i)2.6±1[11] km/s
Age503+75
−70[1] Myr
Other designations
AG+83°357, BD+83°397, FK5 1643, GC 18611, HD 120565, HIP 66878, HR 5203, SAO 2266[12]
Database references
SIMBADdata

HD 120565, also designated as HR 5203, is a star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.91. Gaia DR3 parallax measurements imply a distance of 370 light-years and it is currently drifting closer with a heliocentric radial velocity of −45.2 km/s. At its current distance, HD 120565's brightness is diminished by 0.12 magnitudes due to interstellar extinction[13] and it has an absolute magnitude of +0.48.[6]

HD 120565 has a stellar classification of G9 III,[3] indicating that it is an evolved G-type giant star. It has 2.7 times the mass of the Sun[1] but at the age of 503 million years,[1] it has expanded to 10.8 times the radius of the Sun.[7] It radiates 64.1 times the luminosity of the Sun[1] from its enlarged photosphere at an effective temperature of 4,993 K.[9] HD 120565 is metal deficient with an iron abundance 63.1% that of the Sun's or [Fe/H] = −0.22,[10] and it spins modestly with a projected rotational velocity of 2.6 km/s.[11] It was determined to be a single-lined spectroscopic binary by J.R. De Mederios and J. R. P. da Silva based on radial velocity variations.[11]

  1. ^ a b c d e f g h i j Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Haggkvist1970 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Anders2019 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 Charbonnel2020 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference De Medeiros2002 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 Gontcharov2017 was invoked but never defined (see the help page).