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T Coronae Borealis ❍｜Definition｜1st｜20251119205401-00-⌔

T Coronae Borealis - Wikipedia

T Coronae Borealis

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T Coronae Borealis is a binary star and a recurrent nova about 3,000 light-years (920 parsecs) away in the constellation Corona Borealis.1 T Coronae Borealis is its variable-star designation and the name most frequently used in the astronomical literature, but it also has the official proper name Blaze Star. The system was first observed in outburst in 1866 by John Birmingham,2 but had been observed earlier in quiescence as a 10th magnitude star.3 It may have been observed in 1217 and in 1787 as well.45 In February 1946, the flare-up was discovered independently by three observers: the Soviet amateur astronomer A. S. Kamenchuk, the 15-year-old schoolboy Michael Woodman from Wales, and the British variable star observer N. F. H. Knight.6 This led to the theory that the star flares every 80 years7 with the next nova expected to occur before 2027.

Printed 2026-06-28.

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Footnotes

  1. Andrews, Robin George (March 8, 2024). “The Night Sky Will Soon Get’a New Star.’ Here’s How to See It”. The New York Times. ISSN 1553-8095. LCCN sn78004456. OCLC 1645522. Retrieved March 9, 2024. ↩

  2. 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. ISSN 1538-3873. OCLC 40768120. ↩

  3. Barnard, E. E. (1907). “Nova T Coronae of 1866”. Astrophysical Journal. 25. University of Chicago Press: 279. Bibcode:1907ApJ…25..279B. doi:10.1086/141446. ISSN 0004-637X. ↩

  4. Schaefer, Bradley E. (November 16, 2023). Evans, James (ed.). “The recurrent nova T CrB had prior eruptions observed near December 1787 and October 1217 AD”. Journal for the History of Astronomy. 54 (4). SAGE Publishing: 436–455. arXiv:2308.13668. Bibcode:2023JHA…54..436S. doi:10.1177/00218286231200492. ISSN 0021-8286. LCCN 73618135. OCLC 645363374. ↩

  5. Thompson, Joanna (September 15, 2023). McNamara, Alexander; Ghose, Tia; Specktor, Brandon (eds.). “Evidence of mysterious ‘recurring nova’ that could reappear in 2024 found in medieval manuscript from 1217”. Live Science. Future plc. Retrieved March 21, 2024. ↩

  6. Shears, Jeremy (2026). “Two independent British discoveries of the 1946 eruption of T Coronae Borealis”. Journal of the British Astronomical Association. 136 (2): 91–98. doi:10.64150/869rwd. ISSN 0007-0297. ↩

  7. Morelle, Rebecca; Francis, Alison (December 30, 2024). “Astronomers ready for dazzling but brief celestial show after 80-year wait”. BBC News. Archived from the original on January 25, 2025. ↩

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T Coronae Borealis ❍｜SIMBAD｜1st｜20251021001049-00-●

T Coronae Borealis
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