20 Canum Venaticorum

20 Canum Venaticorum

A light curve for AO Canum Venaticorum, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 13h 17m 32.54093s[2]
Declination +40° 34′ 21.3875″[2]
Apparent magnitude (V) +4.715[3]
Characteristics
Spectral type A9 II mF2[4]
B−V color index 0.30[3]
Variable type δ Sct[5]
Astrometry
Radial velocity (Rv)9.32±0.16[6] km/s
Proper motion (μ) RA: −113.761[2] mas/yr
Dec.: +19.858[2] mas/yr
Parallax (π)13.7210 ± 0.1581 mas[2]
Distance238 ± 3 ly
(72.9 ± 0.8 pc)
Details
Mass2.43[3] M☉
Radius4[7] R☉
Luminosity63[3] L☉
Surface gravity (log g)2.97[8] cgs
Temperature7,314±42[3] K
Metallicity [Fe/H]0.18[7] dex
Rotational velocity (v sin i)15[9] km/s
Age750[3] Myr
Other designations
20 CVn, AO Canum Venaticorum, BD+41°2380, FK5 494, GC 18000, HD 115604, HIP 64844, HR 5017, SAO 44549[10]
Database references
SIMBADdata

20 Canum Venaticorum is a single[11] variable star in the northern constellation of Canes Venatici, located 238 light years from the Sun. This object has the variable star designation AO Canum Venaticorum; 20 Canum Venaticorum is the Flamsteed designation. It is visible to the naked eye as a faint, white-hued star with a baseline apparent visual magnitude of +4.72.[3] The star is moving further from the Earth with a heliocentric radial velocity of +9 km/s.[6] Eggen (1971) listed this star as a member of the Hyades Stream.[12]

This star has a stellar classification of A9 II mF2, which indicates the hydrogen line matches an A-type bright giant but the metal lines are closer to an F-type star. However, it does not appear to be an Am star as the Calcium K line is normal.[4] Earlier, Morgan and Abt (1972) assigned it a giant star class of F3 III.[13] It is classified as a Delta Scuti type variable star with a single radial pulsation mode providing the best fit to the observed variation.[5] Its brightness varies from magnitude +4.70 to +4.75 with a period of 2.92 hours.[14]

20 Canum Venaticorum is 750[3] million years old with 2.43[3] times the mass of the Sun and 4[7] time the Sun's radius. It is radiating 63[3] times the Sun's luminosity from its photosphere at an effective temperature of 7,314 K.[3]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h i j k Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference gray2001 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Chadid2001 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Adamczak2014 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Royer2002 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 Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggen1971 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference MorganAbt1972 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).