T Coronae Borealis ❍｜appendage｜___｜20260628174208-01-•

A	B
Location of T Coronae Borealis (circled in red)	…
Observation data Epoch J2000 Equinox J2000	…
Constellation	Corona Borealis
Right ascension	15${}^h$ 59${}^m$ 30.1622${}^s$1
Declination	+25° 55′ 12.613″1
Apparent magnitude (V)	2.0–10.82
Characteristics	…
Evolutionary stage	Red giant + white dwarf3
Spectral type	M3III+p
Variable type	recurrent nova2
Astrometry	…
Radial velocity (R${}_v$)	−27.75±0.044 km/s
Proper motion (μ)	RA: −4.461 mas/yr1 Dec.: 12.016 mas/yr1
Parallax (π)	1.0920±0.0275 mas1
Distance	2,990 ± 80 ly (920 ± 20 pc)
Absolute magnitude (M${}_V$)	+0.16 (min.)5
Orbit 4	…
Period (P)	227.5528±0.0002 days
Semi-major axis (a)	0.960 AU
Eccentricity (e)	0.009±0.0036
Inclination (i)	61.5°
Periastron epoch (T)	2459978.37±0.08
Semi-amplitude (K${}_1$) (primary)	23.90±0.05 km/s
Details	…
Red giant	…
Mass	0.934 M${}_{☉}$
Radius	69±57 R${}_{☉}$
Luminosity	583±48 L${}_{☉}$
Surface gravity (log g)	0.672${}_{-0.007}^{+0.009}$8 cgs
Temperature	3,561±38 K
Metallicity [Fe/H]	+0.20${}_{-0.03}^{+0.05}$8 dex
Rotational velocity (v sin i)	4.75±0.264 km/s
White dwarf	…
Mass	1.354 M${}_{☉}$
Radius	0.00459 R${}_{☉}$
Luminosity	~10010 L${}_{☉}$
Other designations	…
Blaze Star, T CrB, AAVSO 1555+26, BD+26°2765, HD 143454, HIP 78322, HR 5958, SAO 84129, 2MASS J15593015+255512611	…
Database references	…
SIMBAD	data

T Coronae Borealis

(echo:: @ ᯤ)

Footnotes

1. Vallenari, A.; et al. (Gaia collaboration) (2023). “Gaia Data Release 3. Summary of the content and survey properties”. Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A…674A…1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR. ↩ ↩² ↩³ ↩⁴ ↩⁵

2. Samus, N. N.; Durlevich, O. V.; et al. (2009). “VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)”. VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat…102025S. 1. Bibcode:2009yCat…102025S. ↩ ↩²

3. Kraft, Robert P. (1958). “The Binary System Nova T Coronae Borealis”. Astrophysical Journal. 127. University of Chicago Press: 625. Bibcode:1958ApJ…127..625K. doi:10.1086/146495. ISSN 0004-637X. ↩

4. Munari, U.; Walter, F.; Masetti, N.; Valisa, P.; Dallaporta, S.; Bergamini, A.; Cherini, G.; Frigo, A.; Maitan, A. (July 31, 2025). “T CrB: overview of the accretion history, Roche-lobe filling, orbital solution, and radiative modeling”. Astronomy and Astrophysics. 701: A176. arXiv:2507.23323. Bibcode:2025A&A…701A.176M. doi:10.1051/0004-6361/202555917. ↩ ↩² ↩³ ↩⁴ ↩⁵

5. Nikolov, Yanko (2022). “Interstellar polarization and extinction toward the Recurrent Nova T CRB”. New Astronomy. 97 101859. Elsevier. arXiv:2201.11521. Bibcode:2022NewA…9701859N. doi:10.1016/j.newast.2022.101859. ISSN 1384-1092. OCLC 123402017. ↩

6. Planquart, Léa; Jorissen, Alain; Van Winckel, Hans (2025). “Resolving the mass transfer in the symbiotic recurrent nova T Coronae Borealis”. Astronomy and Astrophysics. 694. EDP Sciences: A85. arXiv:2501.02984. Bibcode:2025A&A…694A..85P. doi:10.1051/0004-6361/202452833. ISSN 0004-6361. LCCN 74220573. OCLC 1518497. CODEN AAEJAF. ↩

7. Norris, Ryan; Anugu, Narsireddy; Gaudin, Thomas; Otulakowska-Hypka, Magdalena; Kaczmarek, Fabian; Caruso, Cameron; Gustafson, Cody; Kotowski, Andrew; Proni, Rebecca; Roy, Nirupam; Baron, Fabien; Banerjee, Dipankar P. K.; Baylis-Aguirre, Dana K.; Creech-Eakman, Michelle J.; Linford, Justin (June 10, 2026). “Pre-nova Observations of T CrB: A view from the CHARA Array”. The Astrophysical Journal Letters. 1004 (1): L13. arXiv:2606.17272. Bibcode:2026ApJ..1004L..13N. doi:10.3847/2041-8213/ae71d0. ISSN 2041-8205. ↩

8. Hinkle, Kenneth H.; Nagarajan, Pranav; Fekel, Francis C.; Mikołajewska, Joanna; Straniero, Oscar; Muterspaugh, Matthew W. (2025). “Binary Parameters for the Recurrent Nova T Coronae Borealis”. The Astrophysical Journal. 983 (1). IOP Publishing: 76. arXiv:2502.20664. Bibcode:2025ApJ…983…76H. doi:10.3847/1538-4357/adbe63. ISSN 1538-4357. ↩ ↩² ↩³ ↩⁴

9. Schlindwein, Wagner; Baptista, Raymundo; Luna, Gerardo Juan Manuel (2025). “Modeling the High-brightness State of the Recurrent Nova T CRB as an Enhanced Mass-transfer Event”. The Astrophysical Journal. 989 (1). IOP Publishing: 78. arXiv:2506.05098. Bibcode:2025ApJ…989…78S. doi:10.3847/1538-4357/ade98c. ISSN 1538-4357. ↩

10. Stanishev, V.; Zamanov, R.; Tomov, N.; Marziani, P. (2004). “Hα variability of the recurrent nova T Coronae Borealis”. Astronomy and Astrophysics. 415 (2). EDP Sciences: 609–616. arXiv:astro-ph/0311309. Bibcode:2004A&A…415..609S. doi:10.1051/0004-6361:20034623. ISSN 0004-6361. LCCN 74220573. OCLC 1518497. S2CID 3000175. CODEN AAEJAF. ↩

11. “T CrB”. SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 30, 2025. ↩