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Photographer:

Mike Olason

Location of Photo:

Tucson, Arizona

Date/Time of photo:

2025 Sept 21, 0247UT

Equipment:

91mm f/4.9 Refractor and ASI533mm camera

Description:

Interstellar Comet 3I/ATLAS continues to brighten steadily, basically following Seiichi Yoshida's predicted magnitude curve as one can see from the star comparison and magnitude calculation on 9/21 when the comet was magnitude 12.9 near the much brighter magnitude 12.1 star. The comet has a very short fan tail above and to the left of the coma.