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[vsnet-alert 4642] CH UMa very bright

CH UMa very bright

   As reported by several observers, CH UMa (UGSS) is undergoing a very
bright outburst.  The current magnitude may surpass previously recorded
maxima.

  YYYYMMDD(UT)   mag  observer
  20000401.572  <137  (H. Itoh)
  20000401.649  <143  (H. Maehara)
  20000401.944  <137  (J. Ripero)
  20000403.249   148  (G. Hanson)
  20000404.203   148  (G. Hanson)
  20000405.217   148  (G. Hanson)
  20000405.890   150  (T. Kinnunen)
  20000405.919   149  (G. Poyner)
  20000406.080  <137  (E. Muyllaert)
  20000406.865  <137  (E. Muyllaert)
  20000406.892  <141  (J. Ripero)
  20000406.924  <137  (P. A. Dubovsky)
  20000406.935   140: (H. McGee)
  20000406.946   148  (C. P. Jones)
  20000406.994   148  (G. Poyner)
  20000407.080  <140  (T. Kinnunen)
  20000407.849   147  (M. Verdenet)
  20000407.883   149  (C. P. Jones)
  20000407.885  <137  (E. Muyllaert)
  20000407.924  <137  (H. McGee)
  20000408.632  <127  (H. Maehara)
  20000408.876  <133  (M. Westlund)
  20000409.010   146  (T. Kinnunen)
  20000409.235  <140  (M. Simonsen)
  20000409.858  <137  (E. Muyllaert)
  20000409.869   148  (C. P. Jones)
  20000409.931  <137  (H. McGee)
  20000410.869  <137  (C. P. Jones)
  20000410.871  <137  (E. Muyllaert)
  20000412.897  <137  (E. Muyllaert)
  20000414.119   125  (J. Gunther)
  20000414.990   124  (P. A. Dubovsky)
  20000415.844   116  (M. Reszelski)
  20000415.857   119  (P. Schmeer)
  20000416.060   112  (T. Kinnunen)
  20000416.485   113  (K. Hirosawa)
  20000416.830   107  (T. Kinnunen)
  20000416.889   113  (M. Reszelski)
  20000417.833   107  (E. Muyllaert)
  20000417.899   101  (T. Kinnunen)
  20000417.908   109  (C. P. Jones)
  20000418.791   103  (M. Reszelski)

  Some Tycho-2 stars which may be useful for comparison:

101042.6 +673931 (2000.0) 1029 0.57 TYC2-4384.235.1 (10.35 0.03) (11.01 0.04)
100744.2 +674945 (2000.0) 1092 0.92 TYC2-4383.37.1 (11.02 0.06) (12.09 0.10)
100519.8 +674330 (2000.0) 1127 0.71 TYC2-4383.47.1 (11.35 0.07) (12.18 0.12)

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