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APOD: 2026 August 24 – Comet 220P in Outburst

News - public release Created on 24 Aug 2026 National Aeronautics and Space Administration

APOD Science APOD APOD: 2026 August 24 – Comet… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss   APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Comet 220P […]

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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

Comet 220P with green coma and white dust tail. Comet 220P in Outburst

Explanation: Comet 220P is unexpectedly bright. Normally, periodic Comet 220P/McNaught is so dim that to see it requires a telescope. Two surprising outbursts this year, however, have made it about 20,000 times brighter than usual, so that it is now visible with binoculars and long-duration camera exposures. As expected, Comet 220P continues to orbit the Sun between Mars and Jupiter with a period of over 5 years. The featured long duration exposure, taken 10 days ago from South Africa, shows the comet‘s bright green head and short dust tail. Reasons for Comet 220P’s impressive outbursts are unknown but could be caused by the release of built-up subsurface gas or comet quakes. Comet 220P will pass about one Earth-Sun distance from the Earth in October, after which it is expected to fade quickly as it begins its return to the far part of its orbit.

Tomorrow’s picture: Moon dark

Date August 24, 2026 Credit & Copyright: Spilios Asimakopoulos Authors & editors: Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti, Keighley Rockcliffe A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.
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