T Coronae Borealis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 15h 59m 30.16s[1] |
| Declination | 25° 55′ 12.6″ |
| Apparent magnitude (V) | 2.0–10.8[1] |
| Characteristics | |
| Spectral type | M3III[1][2] / White Dwarf |
| Variable type | recurrent nova (NR)[1] |
| Astrometry | |
| Radial velocity (Rv) | 14.33[2] km/s |
| Parallax (π) | 1.61 ± 1.63[2] mas |
| Distance | approx. 2,000 ly (approx. 600 pc) |
| Details | |
| Other designations | |
AAVSO 1555+26, 2MASS J15593015+2555126, HD 143454[2] | |
T Coronae Borealis (T CrB), informally nicknamed the Blaze Star,[3] is a recurring nova in the constellation Corona Borealis. It normally has a magnitude of about 10, which is near the limit of typical binoculars. It has been seen to outburst twice, reaching magnitude 2.0 on May 12, 1866 and magnitude 3.0 on February 9, 1946.[4] Though a more recent paper shows the 1866 outburst with a possible peak range of magnitude 2.5 ± 0.5.[5] Even when at peak magnitude of 2.5, this recurrent nova is dimmer than about 120 stars in the night sky.[6]
AAVSO light curve of recurrent nova T CrB from 1 Jan 2008 to 17 Nov 2010. Up is brighter and down is fainter. Day numbers are Julian day.
See also
References
- ↑ 1.0 1.1 1.2 1.3 "T CrB". AAVSO: Variable Star Plotter (VSP). Retrieved 2010-11-15.
- ↑ 2.0 2.1 2.2 2.3 "T Coronae Borealis". SIMBAD Astronomical Database. Retrieved 2010-11-15.
- ↑ A Digital Spectral Classification Atlas, R. O. Gray, 34. Unusual Stellar Spectra III: two emission-line stars
- ↑ Sanford, Roscoe F. (1949). "High-Dispersion Spectrograms of T Coronae Borealis.". Astrophysical Journal 109: 81. Bibcode:1949ApJ...109...81S. doi:10.1086/145106.
- ↑ Schaefer, Bradley E. (2009). "Comprehensive Photometric Histories of All Known Galactic Recurrent Novae". arXiv:0912.4426. Unsupported parameter(s) in cite arXiv (help)
- ↑ "Vmag<2.5". SIMBAD Astronomical Database. Retrieved 2010-06-25.
Further reading
- Wallerstein, George; Tanya Harrison; Ulisse Munari; Andrew Vanture (11 May 2008). "The Metallicity and Lithium Abundances of the Recurring Novae T CrB and RS Oph". Publications of the Astronomical Society of the Pacific 120 (867): 492–497. Bibcode:2008PASP..120..492W. doi:10.1086/587965.
- R and T Coronae Borealis: Two Stellar Opposites at Sky & Telescope
External links
- http://www.daviddarling.info/encyclopedia/B/Blaze_Star.html
- AAVSO: Quick Look View of AAVSO Observations (get recent magnitude estimates for T CrB)
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