Comet C/2023 A3 Tsuchinshan-ATLAS image on 2024 September 22 at 19:05UT using a C11 RASA f/2.2 + Canon 6D. iso1600 18x10sec. FOV 2x1 deg. North left, from Swan Hill, Victoria, Australia A visual estimate at 19:15UT (05:15AEST Mon 23rd) using 15x70mm binoculars was magnitude 3.6 with 4' coma and strong degree of condensation DC7, tail length 1.3 degrees in PA254 Comparison stars Alpha Crt(4.2), Nu Hydra(3.2). Comet magnitude was corrected for atmospheric extinction using the average table. There was still 71% moonlight and twilight interference but conditions are slowly improving. Low altitude (7 degrees). Distance to Sun = 0.41AU (61 million kms) Distance to Earth = 1.11AU (167 million kms) solar elongation = 22 degrees. |
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