Query= DM CYG GCVS Query forms 
 NNo       GCVS          J2000.0        Type       Max       Min I        Min II      Epoch(JD24..) Year        Period        M-m/D    Spectrum       References  Other design. 

------------------------------------------------------------------------------------------------------------------------------------------------------------------

310135 |DM    Cyg *|212111.6+321129 |RRAB      | 10.93   |  11.99     |            |V |42582.406   |     |     0.4198600      |13   |A9-F6            |04957 00522|

------------------------------------------------------------------------------------------------------------------------------------------------------------------


______________The positional information: ___________________________

  NNo     GCVS            J2000.0         p.m.(as/yr) Epoch     Ident.

----------------------------------------------------------------------

310135 |DM    Cyg |212111.55 +321128.7 |+0.007 -0.003|2000.0  | |Tyc2

----------------------------------------------------------------------



_______________Cross-identifications:_______________

DM    Cyg     = AN   1928.0007                |     

DM    Cyg     = GSC  2707.00757               |     

DM    Cyg     = SVS  0164                     |     

____________________________________________________

      Reference to a chart or photograph:
00522. D.Ya.Martynov, Izv Astron Engel'gardt Obs N20, 1938.


      Reference to a study of the star:
04957. V.G.Derevyagin, B.N.Firmanyuk,V.P.Zessewitsch, Astron Tsirk N1166, 7, 1981.


__________________________________________________________________

      Remark:         

    P var. Max = 2425887.560 + 0.4198557d*E (JD2415200 -

    25900) [03506]; Max = 2425887.5597 + 0.41985715d*E

    (JD2425880 - 29250) [00522]; Max = 2433872.420 +

    0.41985842d*E (JD2429250 - 37900) [03506]; Max =

    2438677.708 + 0.4198619d*E (JD2438600 - 41250)

    [07114]; since JD2441240 - see Table.

    There is also Blazhko effect with the elements:

    Max(O - C) = 2442978.97 + 26.01d*E [08853];

    -0.01 d< = O - C <= +0.01d. Delta(S) = 0.

----The End----