Comet 12P Pons-Brooks by Mike Crowle

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5 March 2024

Comet 12P Pons-Brooks

A periodic comet that visits the inner solar system every 71 years. I last posted an image of this comet, taken through a telescope, in July 2023 when it was still rather distant.
Now it is approaching its best, but the sky location means I cannot point the telescope at it. Hence the use of a short telephoto lens and star tracker.

Modified Canon EOS 600D,Carl Zeiss Jena 135mm f/3.5 Sonnar M42
22 x 30-sec exposures at f/4 and ISO 3200 with camera on a Vixen Polarie star tracker. The frames were stacked on the comet in DeepSkyStacker, with curves adjustment and further noise reduction in post-processing.
Also Starnet++ software used to temporarily separate the stars and comet and prevent the stars bloating when comet contrast is stretched; this has revealed more of the tail that would otherwise be lost in the star background. hide exif

Full EXIF Info
Date/Time
Make
Model
Flash Used	No
Focal Length
Exposure Time
Aperture
ISO Equivalent
Exposure Bias
White Balance
Metering Mode
JPEG Quality
Exposure Program
Focus Distance

other sizes: small medium large original auto

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waterfalls man		08-Mar-2024 03:24
Great Capture V

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