Upsilon Coronae Borealis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 16h 16m 44.78703s[1] |
| Declination | +29° 09′ 00.9474″[1] |
| Apparent magnitude (V) | 5.78[2] |
| Characteristics | |
| Spectral type | A3V[3] |
| U−B color index | +0.10[2] |
| B−V color index | +0.07[2] |
| Astrometry | |
| Radial velocity (Rv) | 0.8±1.0[4] km/s |
| Proper motion (μ) | RA: +23.10[1] mas/yr Dec.: −16.00[1] mas/yr |
| Parallax (π) | 4.89 ± 0.53 mas[1] |
| Distance | approx. 670 ly (approx. 200 pc) |
| Absolute magnitude (MV) | −0.72[5] |
| Details | |
| Radius | 1.5[6] R☉ |
| Luminosity | 151[7] L☉ |
| Temperature | 8,098[7] K |
| Rotational velocity (v sin i) | 112[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Upsilon Coronae Borealis, Latinized from υ Coronae Borealis, is a solitary[9] star in the northern constellation of Corona Borealis. It is faintly visible to the naked eye with an apparent visual magnitude of 5.78.[2] Located around 204 parsecs (670 ly) distant, it is a blue-white main-sequence star of spectral type A3V,[3] a star that is currently fusing its core hydrogen.
References
- ^ a b c d e van Leeuwen, F. (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.
- ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- ^ a b c Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (3rd ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
- ^ a b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
- ^ "ups CrB". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-04-25.
{{cite web}}: CS1 maint: postscript (link) - ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.