Zeta2 Coronae Borealis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 15h 39m 22.67317s [1] |
| Declination | +36° 38′ 08.9396″ [1] |
| Apparent magnitude (V) | 4.98[1] |
| Characteristics | |
| Spectral type | B7V[1] |
| Astrometry | |
| Radial velocity (Rv) | −0.00 ± 0.04[1] km/s |
| Proper motion (μ) | RA: -14.82 [1] mas/yr Dec.: -4.74[1] mas/yr |
| Parallax (π) | 6.89 ± 0.52[2] mas |
| Distance | 470 ± 40 ly (150 ± 10 pc) |
| Other designations | |
Zeta2 Coronae Borealis (ζ2 CrB) is a star in the constellation Corona Borealis. Its apparent magnitude is 4.98. It itself is a spectroscopic binary system,[1] made up of two very similar blue-white main sequence stars. Orbit perturbations indicate a third star in the group. Zeta2 is separated by 6.4 arcseconds from Zeta1 Coronae Borealis.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 SIMBAD, HR 5834 (accessed 9 September 2012)
- ↑ van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- ↑ Gordon, K. D.; Mulliss, C. L. (1997). "Zeta$^2$ Coronae Borealis, A Spectroscopic Triple System Including an Asynchronous Close Binary". Publications of the Astronomical Society of the Pacific 109: 221–25. Bibcode:1997PASP..109..221G. doi:10.1086/133877.
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