HD 185075

HD 185075
Location of HD 185075 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 19h 40m 18.71944s[1]
Declination −54° 25′ 04.0417″[1]
Apparent magnitude (V) 6.26[2]
Characteristics
Spectral type K0 III[3]
B−V color index +1.00[2]
Astrometry
Radial velocity (Rv)14.8±0.4[4] km/s
Proper motion (μ) RA: +76.081 mas/yr[1]
Dec.: −11.563 mas/yr[1]
Parallax (π)7.7297 ± 0.0224 mas[1]
Distance422 ± 1 ly
(129.4 ± 0.4 pc)
Absolute magnitude (MV)+0.92[5]
Details
Mass1.34±0.06[6] M☉
Radius12.6±0.6[7] R☉
Luminosity79.8+0.2
−0.1[1] L☉
Surface gravity (log g)2.63±0.11[6] cgs
Temperature4,785±25[6] K
Metallicity [Fe/H]−0.42±0.02[6] dex
Rotational velocity (v sin i)<1[8] km/s
Age414[1] Myr
Other designations
65 G. Telescopii[9], CD−54°8939, CPD−54°9438, GC 27177, HD 185075, HIP 96781, HR 7459, SAO 246204[10]
Database references
SIMBADdata

HD 185075, also known as HR 7459 or rarely 65 G. Telescopii, is a solitary star located in the southern constellation Telescopium. It has an apparent magnitude of 6.26,[2] placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 422 light years[1] and it is currently receding with a heliocentric radial velocity of 14.8 km/s.[4] At its current distance, HD 185075's brightness is diminished by 0.23 magnitudes due to interstellar dust[11] and it has an absolute magnitude of +0.92.[5]

This is an evolved red giant with a stellar classification of K0 III.[3] It has 1.34 times the mass of the Sun[6] but it has expanded to 12.6 times the Sun's radius.[7] It radiates 79.8 times the luminosity of the Sun[1] from its enlarged photosphere at an effective temperature of 4,785 K,[6] giving it an orange hue. HD 185075 is particularly metal deficient with an iron abundance 38% that of the Sun's[6] ([Fe/H] = −0.42) and it spins too slowly for its projected rotational velocity to be measured accurately.[8]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference Ottoni2022 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference De Medeiros2014 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).