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[vsnet-obs 3758] Recent behavior of HS 1804+6753

  The following is compiled from available observations of the eclipsing
dwarf nova HS 1804+6753, which will be observed by HST on Sep. 13.

  (*** indicates outburst maximum)

     UT        mag  code        cycle length
 ------------------------
  960512.972  <146  POY
  960514.039  <148  POY
  960514.978  <148  POY
  960516.053   159  POY
  960522.940   125  JEN  ***
  960524.962  <148  POY
  960525.021   126  POY
  960526.005   129  POY         21 days
  960526.937   128  JEN
  960527.925   143  VAN
  960612.973   127  POY  ***
  960613.985   132  POY
  960617.973   135  POY
  960622.999   149  POY
  960624.973  <146  POY
  960626.001   153  POY
  960702.022  <145  POY         25 days
  960703.978   135  POY
  960705.963   155  POY
  960705.970   133  POY  slow rise
  960705.973   130  POY
  960705.981   127  POY
  960707.035   125  POY  ***
  960707.965   131  POY
  960711.006   155  POY
  960713.019   148  POY
  960714.947   142  POY
  960715.951   144  POY         18 days
  960716.960   148  POY
  960717.963   152  POY
  960720.991  <145  POY
  960724.949   144  POY
  960725.974   133  POY  ***
  960801.974   143  POY
  960802.946   146  POY         18 days
  960804.917   148  POY
  960807.924   153  POY
  960812.942   129  POY  ***
  960813.860   134  PIE
  960813.938   128  POY
  960815.331   127  SQN
  960816.206   128  SQN
  960816.897   131  POY
  960817.850   134  PIE
  960818.890   137  PIE
  960818.899   135  POY
  960819.869   145  PIE
  960819.880  <145  FRF         18 days
  960820.000   136  JEN  short brightening?
  960821.887   146  POY
  960821.899  <146  FRF
  960822.199  <134  SQN
  960822.969  <140  FRF
  960824.830   149: PIE
  960825.899   144  POY
  960828.219  <134  SQN
  960829.222  <134  SQN
  960830.287   140: SQN
  960830.912   133  POY  ***
  960831.869   134  PIE
  960902.303   142  SQN
  960902.830   144  PIE
  960903.830   148  PIE
  960904.296   146: SQN
  960905.338  <145  SQN
  960905.849   149  PIE
  960906.228  <145  HSG
  960906.287  <145  SQN
  960906.869   146: POY
  960907.192  <145  SQN
  960907.889   144  POY
  960908.133  <145  HSG
  960909.242  <145  HSG
  960909.830   145  PIE

  Recent cycle lengths of 18 days suggest the next outburst to occur around
Sep. 17.  If we take Jensen's Aug. 20 data as an outburst, the cycle length
might be halved.  In the latter case, an outburst may be due right now.
Can anyone confirm this?

Regards,
Taichi Kato