12p 20230723 mmattiazzo

I’ve created an animation over the past 4 nights showing the expansion of the coma and appearance of the “horns”.

Images were taken remotely using ITEL T18 Nerpio Spain 0.32-m f/5.3 CDK + QHY600.

Cropped 60 second exposures.

 

12P Pons-Brooks on

2023 July 23 at 21:30UT. +72hrs post outburst. V mag = 12.0. Coma diameter = 50"The horns, 30" long in PA008.

2023 July 22 at 21:30UT. +48hrs post outburst. V mag 11.9. Coma diameter = 35". The horns, 20" long in PA008, are starting to become more pronounced as the coma expands.

2023 July 21 at 21:30UT. +24hrs post outburst. Vmag=11.9. Coma diameter = 25"

2023 July 21 at 02:00UT. + 4hrs post outburst. UCAC4 V mag =11.8. Coma diameter = 17"