Comet C/2023 A3 Tsuchinshan-ATLAS
Taken by Michael Mattiazzo on September 20, 2024 @
Swan Hill, Australia
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Details:
Comet C/2023 A3 Tsuchinshan-ATLAS on 2024 September 20 at 19:17UT using a C11 RASA f/2.2 + Canon 6D. iso1600 12x5sec. FOV 2x1 deg. North left from Swan Hill, Victoria, Australia.
Brightening steadily as it approaches Sun (Sep 27) and Earth (Oct 12)
Visual estimate using 15x70mm binoculars m1 = 3.9, coma diameter 4', tail 35' in PA245.
Comparison stars Alpha Crt(4.2), Nu Hydra(3.2). Corrected for atmospheric extinction using the average table.
Moonlight and twilight interference as well as low altitude (6 degrees).
Distance to Sun = 0.43AU (64 million kms)
Distance to Earth = 1.20AU (180 million kms)
solar elongation = 20 degrees.
https://southerncomets.info/
Photographer's website:
https://southerncomets.info/
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