19 Canum Venaticorum

19 Canum Venaticorum
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 13h 15m 31.95290s[1]
Declination +40° 51′ 18.7208″[1]
Apparent magnitude (V) 5.777[2]
Characteristics
Spectral type A7V[3]
Astrometry
Radial velocity (Rv)-18.3 ± 2[4] km/s
Proper motion (μ) RA: -119.47[1] mas/yr
Dec.: 11.53[1] mas/yr
Parallax (π)13.50 ± 0.44[1] mas
Distance242 ± 8 ly
(74 ± 2 pc)
Orbit[5]
Period (P)219.2 yr
Semi-major axis (a)0.745″
Eccentricity (e)0.686
Inclination (i)44.5°
Longitude of the node (Ω)22.2°
Periastron epoch (T)2201.7
Argument of periastron (ω)
(secondary)		273.3°
Details
Mass1.96 ± 0.11[6] M☉
Radius2.5[6] R☉
Surface gravity (log g)4.09 ± 0.14[7] cgs
Temperature8048 ± 274[7] K
Rotational velocity (v sin i)110[3] km/s
Other designations
BD+41° 2374, HD 115271, HIP 64692, HR 5004, SAO 44531
Database references
SIMBADdata

19 Canum Venaticorum is a binary star in the constellation Canes Venatici. It is approximately 242 light years from Earth, based on its parallax.[1]

The primary component, 19 Canum Venaticorum A, is a white A-type main sequence dwarf with an apparent magnitude of +5.77. Its companion, 19 Canum Venaticorum B, is a tenth magnitude star located only 0.37 arcseconds from the primary.

References

  1. 1 2 3 4 5 6 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357. Archived from the original on 2016-04-02.
  2. ↑ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. 1 2 Royer, F.; Zorec, J.; Gómez, A. E. (2007). "Rotational velocities of A-type stars. III. Velocity distributions". Astronomy and Astrophysics. 463 (2): 671. Bibcode:2007A&A...463..671R. arXiv:astro-ph/0610785 Freely accessible. doi:10.1051/0004-6361:20065224.
  4. ↑ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.
  5. ↑ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.
  6. 1 2 Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. Bibcode:1999A&A...352..555A. arXiv:astro-ph/9911002 Freely accessible.
  7. 1 2 David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. Bibcode:2015ApJ...804..146D. arXiv:1501.03154 Freely accessible. doi:10.1088/0004-637X/804/2/146.


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