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Name
  XZ Dra  
AAVSO UID
000-BCF-507 (21456 observations)  
Constellation
Draco Sequence
J2000.0
19 09 42.61 +64 51 32.1  (287.42754 +64.85892) Search nearby
B1950.0 19 09 24.42 +64 46 32.4
Proper motion
RA: 9.970 +/- 0.192 mas/yDec: 3.520 +/- 0.183 mas/ySource: Gaia DR1
Galactic coord. 95.649 +22.499
Other names

(Internal only)
1SWASP J190942.60+645132.1 AAVSO 1909+64 AN 433.1928
BD+64 1332 HIP 94134 SAO 18183
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Variability type
RRAB/BL
Spectral type A6-F6
Mag. range
9.59 - 10.65 V
Discoverer --
Epoch
02 Sep 1973 (HJD 2441928.374) Ephemeris
Outburst --
Period 0.476497 d  (11.4359 h)
Rise/eclipse dur. 20%  (2.29 h)
Remarks
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1 GCVS Team P var. Before JD2438000 Max = 2427985.648 + 0.4764944d*E [A.V.Solov'ev, Tadj. Tr. 1, Issue 3, 1941.]. Epochs after JD2438000 are represented dy the elements in the Table only on average. Blazhko effect; according to [A.A.Batyrev, Perem. Zvezdy 10, N5, 292, 1955.], Pi = 78d. [Fe/H] = -0.57.
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References
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1 Greer, P. A.; Payne, S. G.; Norton, A. J.; et al., 2017, The SuperWASP
catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect
candidates
2017A&A...607A..11G
2 B.N.Firmanyuk, G.A.Lange, V.P. Zessewitsch, Astron. Tsirk. N853, 1975. --
3 A.A.Batyrev, Perem. Zvezdy 10, N5, 292, 1955. 1955PZ.....10..292B
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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 = 9.45H = 9.23K = 9.15J - K = 0.30
AllWISE W1 = 9.09W2 = 9.10W3 = 9.04W4 = 8.82W1 - W2 = -0.01W3 - W4 = 0.21
GALEX-DR5 FUV = 17.99NUV = 13.89FUV - NUV = 4.10
Images
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Supporting Documents
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Revision History
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3 Admin, VSX 2015-12-18 21:46 UTC Updated variability type to indicate Blazhko effect.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.