Comet 220P/McNaught near the Moon
Taken by Mike Olason on June 10, 2026 @
Tucson, Arizona
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Details:
On the mornings of June 9 and 10 the Moon made its close approach to 220P at 5 degrees to the west and then 8 degrees to the northeast of the comet, had to rig up some temporary shielding to keep the Moonlight off the optics as best as possible, somewhat successful. Since my first observation on June 3 after the major eruption at the end of May, I have observed the comet 7 mornings with the same equipment and done no special processing on any of the images as one can tell. The results of these observations are that the comet has faded about 2 magnitudes in the past week from ~magnitude 9 to ~magnitude 11, the coma has decreased in width from 8' to 3' although with the Moon being so close to the comet the past several mornings the coma may currently be wider than 3', the dust tail has increased in length from 2' to 15' again probably longer but hidden by the moonlight and has grown wider.
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