24 Canum Venaticorum

24 Canum Venaticorum
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 13h 34m 27.25928s[1]
Declination +49° 00′ 57.5065″[1]
Apparent magnitude (V) +4.68[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A5V
B−V color index 0.132±0.005[2]
Astrometry
Radial velocity (Rv)−18.3±2.8[4] km/s
Proper motion (μ) RA: −128.38[1] mas/yr
Dec.: +28.05[1] mas/yr
Parallax (π)18.09 ± 0.19 mas[1]
Distance180 ± 2 ly
(55.3 ± 0.6 pc)
Absolute magnitude (MV)0.85[5]
Details
Mass1.74[6] M☉
Radius1.90[7] R☉
Luminosity40.8+1.1
−1.0[3] L☉
Surface gravity (log g)3.97[6] cgs
Temperature8,285±282[6] K
Rotational velocity (v sin i)159[3] km/s
Age310[6] Myr
Other designations
24 CVn, BD+49° 2227, FK5 3083, GC 18356, HD 118232, HIP 66234, HR 5112, SAO 44668[8]
Database references
SIMBADdata

24 Canum Venaticorum is a single[9] star in the northern constellation of Canes Venatici, located 277 light years away from the Sun.[1] This object is visible to the naked eye as a faint white-hued star with an apparent visual magnitude of +4.68.[2] It is moving closer to the Earth with a heliocentric radial velocity of −18 km/s.[4]

This is an A-type main-sequence star with a stellar classification of A4 V,[10] and it is a shell star with rotationally-broadened lines.[11] It is 310[6] million years old with a projected rotational velocity of 159 km/s.[3] This rate of spin is giving the star an oblate shape with an equatorial bulge that is 7% larger than the polar radius.[12] The star has 1.74[6] times the mass of the Sun and 1.9[7] times the Sun's radius. It is radiating 41[3] times the Sun's luminosity from its photosphere at an effective temperature of 8,285 K.[6]

24 Canum Venaticorum displays a significant infrared excess at wavelengths of 24μm and 70μm, indicating an orbiting circumstellar debris disk.[11] The signature matches a black body temperature of 464 K for an estimated orbital radius of 1.4 AU.[7]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 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 c d e Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Pizzolato2000 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Patel2014 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference mora2001 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Roberge2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference vanBelle2012 was invoked but never defined (see the help page).