3I/ATLAS now 12.5 magnitude
Taken by Mike Olason on September 26, 2025 @
Tucson, Arizona
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Details:
Interstellar Comet 3I/ATLAS as observed from the surface of the Earth in all RGB wavelengths, much like what your eye would see, is now magnitude 12.5. The comet brightened a little over several days to magnitude 12.4 on 9/24 from magnitude 12.9 on 9/21 and is now magnitude 12.5 on 9/26 as the comet is getting lower to the western horizon each night as it starts to get dark as observed from Arizona. In about a week it will become unobservable from Arizona as it sets before dark.
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