T Coronae Borealis

Not to be confused with Tau Coronae Borealis.
T Coronae Borealis
Location of T Coronae Borealis (circled in red)
Observation data
Epoch J2000      Equinox J2000
Constellation Corona Borealis
Right ascension 15h 59m 30.1622s[1]
Declination 25° 55′ 12.613″[1]
Apparent magnitude (V) 2.0–10.8[2]
Characteristics
Evolutionary stage Red giant + white dwarf
Spectral type M3III+p[3]
Variable type recurrent nova[2]
Astrometry
Radial velocity (Rv)−27.79[4] km/s
Proper motion (μ) RA: −4.220[5] mas/yr
Dec.: 12.364[5] mas/yr
Parallax (π)1.2127 ± 0.0488 mas[5]
Distance806 pc (2,630 ly)[6] ly
Orbit
Period (P)227.55 d[7]
Semi-major axis (a)0.54 AU[6]
Eccentricity (e)0.0[7]
Inclination (i)67[8]°
Details
Red giant
Mass1.12[6] M☉
Radius75[8] R☉
Luminosity655[9] L☉
Surface gravity (log g)2.0[10] cgs
Temperature3,600[10] K
White dwarf
Mass1.37[6] M☉
Luminosity~100[8] L☉
Other designations
BD+26° 2765, HD 143454, HIP 78322, HR 5958, SAO 84129, 2MASS J15593015+2555126
Database references
SIMBADdata

T Coronae Borealis (T CrB), nicknamed the Blaze Star, is a binary star and a recurrent nova in the constellation Corona Borealis.[11] It was first discovered in outburst in 1866 by John Birmingham,[12] though it had been observed earlier as a 10th magnitude star.[13] It may have been observed in 1217 and in 1787 as well.[14][15] It is expected to undergo an outburst again very soon; likely during August 2024.[16]

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  10. ^ a b Cite error: The named reference wallerstein was invoked but never defined (see the help page).
  11. ^ Andrews, Robin George (8 March 2024). "The Night Sky Will Soon Get 'a New Star.' Here's How to See It. - A nova named T Coronae Borealis lit up the night about 80 years ago, and astronomers say it's expected to put on another show in the coming months". The New York Times. Archived from the original on 8 March 2024. Retrieved 9 March 2024.
  12. ^ Pettit, Edison (1946). "The Light-Curves of T Coronae Borealis". Publications of the Astronomical Society of the Pacific. 58 (341): 153. Bibcode:1946PASP...58..153P. doi:10.1086/125797.
  13. ^ Barnard, E. E. (1907). "Nova T Coronae of 1866". Astrophysical Journal. 25: 279. Bibcode:1907ApJ....25..279B. doi:10.1086/141446.
  14. ^ Schaefer, Bradley E. (16 November 2023). "The recurrent nova T CrB had prior eruptions observed near December 1787 and October 1217 AD". Journal for the History of Astronomy. 54 (4): 436–455. arXiv:2308.13668. Bibcode:2023JHA....54..436S. doi:10.1177/00218286231200492. ISSN 0021-8286.
  15. ^ Thompson, Joanna (September 15, 2023). "Evidence of mysterious 'recurring nova' that could reappear in 2024 found in medieval manuscript from 1217". Live Science. Retrieved 2024-03-21.
  16. ^ Lyster, Tim (1 May 2024). "The Jewel in the Crown". AAVSO. American Association of Variable Star Observers. Retrieved 2 July 2024.