NNo GCVS J2000.0 Type Max Min I Min II Epoch Year Period M-m/D Spectrum References Other desig. p.m.(as/yr) Epoch Ident. New type GCVS
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310051 |XZ Cyg *|193229.31 +562317.5 |RRAB | 8.9 | 10.16 | |V |44124.440 | | 0.46670 | |A5-F5 |00001 06225| |+0.084 -0.024|2000.0 | |Hip | |XZ Cyg |
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_______________Cross-identifications:_______________
XZ Cyg = AN 1905.0076 |
XZ Cyg = BD +56 2257 |
XZ Cyg = GSC 03929.01961 |
XZ Cyg = HD 239124 |
XZ Cyg = Hip 096112 |
XZ Cyg = SAO 031761 |
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Reference to a chart or photograph:
06225. V.P.Zessewitsch, Variable Stars and Methods of Their Studies, (in russian) M., 1970.
Reference to a study of the star:
00001. GCVS compilers.
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Remark:
[Fe/H] = -1.2. P var. Max = 2417201.241 + 0.4665878*E -
0.000107d*10**(-6)*E**2 (JD2414000 - 35000) [02550];
Max = 2438562.796 + 0.466570d*E (JD2434000 - 39800);
Max = 2440445.789 + 0.466497d*E (JD2439800 - 41000)
[06237]; Max = 2441453.3856 + 0.4664731d*E
(JD2441000 - 42500) [07424]; Max = 2443028.641 +
0.466438d*E (JD2442500 - 43800) [09101]; Max =
2444142.650 + 0.466649d*E (JD2443800 - 44200)
[09102]; since JD2444100 - see Table.
Besides that the star has a strongly
expressed Blazhko effect; the period of Blazhko effect
varies, too [07424, 07425]. 0.13P <= M - m <= 0.22P;
0.90m <= A(B) <= 1.70m, 0.70m <= A(B) <= 1.30m;
-0.05P < O - C < +0.05;
Max A = 2417025.5 + 57.401d*E (JD2417000 - 38500);
Max A = 2438881.7 + 58.387d*E (since JD2438500).[09103].
After JD2444000
Blazhko effect period probably decreased to 56.3d [09102].
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