61 days before the Megaburst of 17P/Holmes

A Jupiter-family comet, 17P/Holmes, suddenly underwent a spectacular outburst on 2007 October 23, about 173 days after the perihelion passage. There has been no more outstanding comet outburst than the 17P/Holmes event since the beginning of modern astronomical observations. However, little is known about the activity of the comet before the outburst because of the accidental event. We found that 17P/Holmes appeared in the AKARI all sky survey data. It was taken on 2007 August 23, 112 days after the perihelion passage and 61 days before the outburst. The 9 micron images shows obvious coma and tail. We study the dust production rate from these images and evaluate the fractional active area. We compare these results with those of data after the outburst, and discuss the aftermass.