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HD 193373

HD 193373
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Delphinus
Right ascension 20h 19m 29.2960s[1]
Declination +13° 13′ 00.3571″[1]
Apparent magnitude (V) 6.21[2]
Characteristics
Evolutionary stage AGB[3]
Spectral type M1 III[4]
B−V color index +1.63[2]
Astrometry
Radial velocity (Rv)22.68±0.13[5] km/s
Proper motion (μ) RA: −15.865 mas/yr[1]
Dec.: −18.581 mas/yr[1]
Parallax (π)3.8556 ± 0.0442 mas[1]
Distance846 ± 10 ly
(259 ± 3 pc)
Absolute magnitude (MV)−0.46[6]
Details
Mass1.77[7] M☉
Radius57.5[8] R☉
Luminosity592±16[9] L☉
Surface gravity (log g)0.89[10] cgs
Temperature3,884±122[8] K
Metallicity [Fe/H]+0.08[10] dex
Other designations
AG+13°2092, BD+12°4289, HD 193373, HIP 100208, HR 7771, SAO 105961[11]
Database references
SIMBADdata

HD 193373 (HR 7771) is a solitary red hued star located in the equatorial constellation Delphinus. It has an apparent magnitude of 6.21,[2] placing it near the limit for naked eye visibility. Parallax measurements place it 846 light years distant[1] and it is currently receding with a heliocentric radial velocity of 22.7 km/s.[5]

This is an asymptotic giant branch star[3] with a stellar classification of M1 III.[4] In its current state, the object is fusing hydrogen and helium shells around an inert carbon core. HR 7771 has 177% the mass of the Sun[7] but has expanded to an enlarged radius of 57.5 R☉.[8] It radiates at 592 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 3,884 K,[8] giving a red hue. HD 193373 has an iron abundance 120% that of the Sun, making it slightly metal enriched.[10]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Wilson1950 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Famaey2009 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 Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
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