T Coronae Borealis

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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[edit]

References[edit]

  1. ^ a b c d "T CrB". AAVSO: Variable Star Plotter (VSP). Retrieved 2010-11-15. 
  2. ^ a b c d "T Coronae Borealis". SIMBAD Astronomical Database. Retrieved 2010-11-15. 
  3. ^ A Digital Spectral Classification Atlas, R. O. Gray, 34. Unusual Stellar Spectra III: two emission-line stars
  4. ^ Sanford, Roscoe F. (1949). "High-Dispersion Spectrograms of T Coronae Borealis.". Astrophysical Journal 109: 81. Bibcode:1949ApJ...109...81S. doi:10.1086/145106. 
  5. ^ Schaefer, Bradley E. (2009). "Comprehensive Photometric Histories of All Known Galactic Recurrent Novae". arXiv:0912.4426.
  6. ^ "Vmag<2.5". SIMBAD Astronomical Database. Retrieved 2010-06-25. 

Further reading[edit]

External links[edit]