Comet 17P/Holmes had a massive outburst at approximately 2007 October 23.8 and its total brightness reached maximum (from m = 17 to m = 2.5) around 2007 October 25, about 1.7 days (42 hr) after the event.
refractor WO 80ED zenithstar, Canon Eos400D standard, eq6 mount Astromeccanica motors,
light 30 of 30''
(Corrado Di Noto)
