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彗星C/2007 W1 (Boattini)
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直接把www.aerith.net的Weekly Information抄过来了:
It is brightening much faster than expected. It is already so bright as 6.2
mag (May 14, Marco Goiato). The apparent size is so large as 20 arcmin. It
will pass 0.85 A.U. from the sun in late June, and it may reach up to 4.5
mag. In the Northern Hemipshere, it is observable until around May 25, when
the comet will be 6 mag. It will be unobservable for one and a half month
around the perihelion passage. But it will appear in the morning sky again
at 5.5 m
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