Comet 17P/Holmes

Amazing outburst! Now Visible

Great outburst occured on Oct. 24, and it bacame a naked eye comet of 2 mag. It still keeps so bright as 4.2 mag on Feb. 22 (Juan Jose Gonzalez). However, it became hard to see and reported so faint as 5 mag without an excellent sky condition. It was completely stellar just after the outburst. Then the coma had spread out and now it looks like a huge nebula. The coma diameter has increased up to about 90 arcmin in December and January. But now it is going away from the earth, and the diameter reduced to about 60 arcmin. This comet was also in great outburst at the discovery in 1892 and became so bright as 4 mag. At that time, the comet faded after the first outburst, but soon brightened again in the second outburst. The comet will be observable in excellent condition for a while after this. It will be visible with naked eyes for a while in the dark sky.

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