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 |
| Distance | 242 ± 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 | |
| Mass | 1.96 ± 0.11[6] M☉ |
| Radius | 2.5[6] R☉ |
| Surface gravity (log g) | 4.09 ± 0.14[7] cgs |
| Temperature | 8048 ± 274[7] K |
| Rotational velocity (v sin i) | 110[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
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 2 3 4 5 6 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Archived from the original on 2016-04-02.
- ↑ 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.
- 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. arXiv:astro-ph/0610785. Bibcode:2007A&A...463..671R. doi:10.1051/0004-6361:20065224.
- ↑ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.
- ↑ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.
- 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. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A.
- 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. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.