Rare superoutburst of V592 Her (update) YYMMDD(UT) mag observer 980823.231 <146 (L. E. Shaw) 980823.506 <142 (T. Watanabe) 980824.819 <140 (T. Kinnunen) 980824.901 <153 (G. Poyner) 980825.899 <132 (P. Schmeer) 980826.835 120 (T. Kinnunen) 980826.862 123 (T. Kinnunen) 980826.915 125 (T. Kinnunen) 980827.181 130 (L. E. Shaw) 980827.192 130 (G. Hanson) 980827.269 130 (L. E. Shaw) 980827.851 135 (G. Poyner) 980827.892 132 (T. Kinnunen) 980827.908 133 (P. Schmeer) 980828.233 129 (L. E. Shaw) 980828.849 133 (E. Broens) 980828.856 135 (G. Poyner) 980828.903 134 (G. Poyner)