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Name
  WZ Sge  
AAVSO UID
000-BCK-656 (99735 observations)  
Constellation
Sagitta Sequence
J2000.0
20 07 36.51 +17 42 14.7  (301.90213 +17.70408) Search nearby
B1950.0 20 05 20.87 +17 33 29.2
Galactic coord. 57.537 -7.930
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J200736.4+174217 1SXPS J200736.7+174215 2E 2005.3+1733
2E 4322 2MASS J20073649+1742147 2RXP J200736.6+174218
2RXS J200736.5+174219 3XMM J200736.5+174213 AAVSO 2003+17
CMC15 J200736.5+174214 Downes WZ Sge EGGR 136
GALEX J200736.6+174214 GSC2.3 N1US062532 HV 3518
Lanning 50 N Sge 1913 Nova Sge 1913
UCAC4 539-122231 URAT1 539-535296 USNO-B1.0 1077-0629939
WDS 20076+1741B WISE J200736.55+174215.1 XMMOM J200736.5+174215
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Variability type
UGWZ+E+ZZ
Spectral type DAep(UG)
Mag. range
7 - 15.53 B
Discoverer Joanna Crighton Stevens Mackie
Epoch
13 Aug 2002 (HJD 2452500.0549) Ephemeris
Outburst --
Period 0.056687846 d  (81.630498 min)
Rise/eclipse dur. --
Remarks
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1 GCVS Team Nova Sge 1913, 1946, 1978. VB A (B 15.76m B, 7", 280deg). Really it is not a nova. Three outbursts were registered up to day: JD2420094, 32001, 43844 [I.Patterson, J.T.McGrow, L.Coleman, J.L.Africano, ApJ 248, 1067, 1981., J.A.Mattei, JRAS Can 74, N1, 53, 1980.]. There are superhumps on the light curve during the outburst with 0.057250d >= P >= 0.05714d (A=0.3m V) [I.Patterson, J.T.McGrow, L.Coleman, J.L.Africano, ApJ 248, 1067, 1981., D.Targan, IBVS N1539, 1979.]. There are light variations between the outbursts (A = 0.14m - 0.3m). During some of light weakenings Algol-like eclipses are observed (A = 0.2m) with the elements: Min I = 2437547.72845 + 0.0566878455d*E [E.L.Robinson, R.E.Nather, J.Patterson, ApJ 219, 168, 1978.]; D = 0.04P. d = 0.02P. There are also rapid light oscillations (A <= 0.01m). The periods of these oscillations before the 1978 outburst were 28.98s and 27.87s [E.L.Robinson, R.E.Nather, J.Patterson, ApJ 219, 168, 1978.], but after this outburst - 28.95963s [J.Middleditch, J.Nelson, BAAS 11, N4, 664, 1979.]. According to [J.Patterson, ApJ 241, 235, 1980.], in 1976 - 78 these oscillations were represented by the elements: Max = 2443311.790250 + 0.00032254826d*E + 9.8d*10**(-16)*E**2.
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References
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1 T. Kato et al., 2009, arXiv:0905.1757v1 [astro-ph.SR] 2009arXiv0905.1757K
2 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
3 J.M. Kreiner, 2004, Acta Astronomica 54, 207 2004AcA....54..207K
4 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
5 G.Williams, ApJ Suppl 53, N3, 523, 1983. 1983ApJS...53..523W
6 M.F.Walker, M.Bell, ApJ 237, 89, 1980. 1980ApJ...237...89W
7 Bob Nelson's O-C files, 2016 --
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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 = 14.86H = 14.56K = 14.00J - K = 0.86
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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6 Schmeer, Patrick 2018-03-29 07:57 UTC UCAC4 position. Discoverer's first names added.
5 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
4 Admin, VSX 2009-10-29 21:32 UTC Update from [2004AcA....54..207K].
3 Admin, VSX 2009-05-13 20:48 UTC Update from [2009arXiv0905.1757K].
2 Admin, VSX 2007-03-23 15:52 UTC Discoverer added.
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.