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Name
  T CrB  
AAVSO UID
000-BBW-825 (227195 observations)  
Constellation
Corona Borealis Sequence
J2000.0
15 59 30.16 +25 55 12.6  (239.87567 +25.92017) Search nearby
B1950.0 15 57 24.55 +26 03 39.0
Proper motion
RA: -4.410 +/- 0.058 mas/yDec: 12.023 +/- 0.064 mas/ySource: Gaia DR1
Galactic coord. 42.374 +48.165
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1SXPS J155930.1+255514 3XMM J155930.1+255512 AAVSO 1555+26
ASAS J155930+2555.2 ASASSN-V J155930.27+255511.9 BD+26 2765
Downes T CrB HD 143454 HIP 78322
HR 5958 MWC 413 N CrB 1866
Nova Coronae Borealis 1866 Nova CrB 1866 SAO 84129
SWIFT J1559.6+2554 X 15574+261  
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Variability type
NR+ELL
Spectral type M3III+pec(NOVA)
Mag. range
2.0 - 10.8 V
Discoverer John Birmingham
Epoch
24 Sep 2011 (HJD 2455828.9) Ephemeris
Outburst --
Period 227.55 d
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick Discovered on 1866 May 12 by John Birmingham. First nova to be identified with an existing star (BD +26°2765, 9.5 mag). Second known eruption detected independently by Norman F. H. Knight (1946 Feb. 9.25 UT) and Armin Joseph Deutsch (Feb. 9.35 UT). Gaia DR2 parallax 1.2127 ± 0.0488 mas (distance 806 ± 33 pc).
2 Otero, Sebastian Alberto Amplitude for ELL variations 0.45 mag. GCVS outburst cycle 29,000 days.
3 GCVS Team VB? A (B <= 12m, 0.2"). SB (P = 227.6d). The spectral period is present in the photometric data of 1891 - 1917 and 1960 - 1971 [J.Bailey, JBAA 85, N3, 217, 1975.]. The epoch of the first outburst JD2402734 (1866). Two smaller outbursts were observed in UV light, JD2438030 (1963) and 2442543 (1975) [L.H.Palmer, J.L.Africano, IBVS N2069, 1982.].
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References
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1 Maslennikova, N. A.; Tatarnikov, A. M.; Tatarnikova, A. A.; et al., 2023,
Recurrent Symbiotic Nova T Coronae Borealis Before Outburst
2023arXiv230810011M
2 M. Gromadzki, J. Mikolajewska, I. Soszynski, 2013, arXiv:1312.6063
[astro-ph.SR]
2013arXiv1312.6063G
3 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
4 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
5 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
6 Herbig, G. H.; Neubauer, F. J., 1946, The Spectrum of T Coronae Borealis at
the 1946 Maximum
1946PASP...58..196H
7 Birmingham, J., 1866, The new variable near η Coronae *** Please covert MNRAS 26 (1866), 310 to bibcode ***
External Links
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 6.00H = 5.15K = 4.81J - K = 1.19
AllWISE W1 = 4.54W2 = 4.50W3 = 4.41W4 = 4.23W1 - W2 = 0.04W3 - W4 = 0.18
APASS-DR9 B = 11.43V = 10.12g' = 11.11B - V = 1.32
GALEX-DR5 FUV = 16.17NUV = 15.23FUV - NUV = 0.94
SDSS-DR12 u = 12.23g = 10.89r = 9.73i = 13.93z = 8.07u - g = 1.33r - i = -4.20
Images
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Supporting Documents
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Campaigns/Programs
 Legacy CVs
 BAA VSS Recurrent Objects Programme
Revision History
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7 Otero, Sebastian Alberto 2023-08-22 14:19 UTC Epoch and period from 2023arXiv230810011M.
6 Schmeer, Patrick 2019-04-02 11:41 UTC Discoverer's given name added.
5 Admin, VSX 2013-12-27 05:48 UTC Update from [2013arXiv1312.6063G].
4 Otero, Sebastian Alberto 2011-01-12 01:48 UTC Primary record creation. Orbital period from Downes (2001). Epoch from ASAS-3 data.
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 19:52 UTC Discoverer added.
1 Admin, VSX 2005-12-18 01:33 UTC Initial database population.