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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520284 |MV    Lyr *|190716.29 +440108.6 |NL        | 12.2    |  18.0      |            |B |            |     |                    |     |Op+M5V           |09372 00365|           |             |1951.672| |A2.0     |          |MV    Lyr |
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_______________Cross-identifications:_______________
MV    Lyr     = SVS  1021                     |     
MV    Lyr     = X    1905-439                 |     
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      Reference to a chart or photograph:
00365. M.F. Walker, PASP 66, 71, 1954 {1954PASP...66...71W}

      Reference to a study of the star:
09372. W.Wenzel, B.Furhmann, MVS 9, H.6, 1975, 1983.
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      Remark:         
    SB (Porb = 0.1336d [09373]).
    Quasiperiodic fadings of different amplitude:
    Min = 2425558 + 455.5d*E (JD2425500 - 30100);
    Min = 2430113 + 325.3d*E (JD2430100 - 36900);
    Min = 2436944 + 357.8d*E (JD2436900 - 44100) [09372].
    After JD2444100 the mean brightness
    level became fainter by 5m; outbursts with an amplitude
    up to 3m of 1 - 2 months duration are observed [09404].
    During the bright level of light, flickering up
    to 0.4m in 5 Min in U bAnd is observed [00365]. Soft
    X-ray source.
    B - V: 0.00 +- 0.40; U - B:  -0.86 +  -1.30.

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