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* * * * * C/2024 G3 (ATLAS) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2025 2 23.96 S 8.5 TK 10.0B 20 2 1 GOI Araçatuba (Comet altitude 10°, Sun altitude -15°.) 2025 2 18.45 5.0B 10 & 4 SEA Cowra, NSW (Appeared as a very faint, broad, shaft of misty light.) 2025 2 17.45 S 9.2 AA 10.0B 25 3.5 95 SEA Cowra, NSW (Appeared even fainter than previous evening, but some haze possible.) 2025 2 16.96 S 7.3 HD 10.0B 20 4 1 GOI Araçatuba (Comet altitude 12°, Sun altitude -14°.) 2025 2 16.44 S 8.5 AA 10.0B 25 2.7 90 SEA Cowra, NSW (Very low surface brightness.) 2025 2 9.96 S 6.5 HD 10.0B 20 5 1/ 1 100 GOI Araçatuba (Comet altitude 12.5°, Sun altitude -13°, strong moonlight.) 2025 2 3.45 I 4.9 AA 0.0E 1 10 95 SEA Cowra, NSW (Difficult with naked eye in moonlight.) 2025 2 2.45 S 4.7 AA 5.0B 10 SEA Cowra, NSW (Feb 2.46, with naked eye 10° tail in p.a. 95 deg.) 2025 2 1.46 I 4.5 AA 0.0E 1 & 11 SEA Cowra, NSW 2025 1 31.46 I 4.4 AA 0.0E 1 15 & 85 SEA Cowra, NSW (Tail fainter NE. Full length glimpsed using averted vision. Comet still a fine sight in 10x50B.) 2025 1 30.94 sI 4.5 HD 0.7E 1 12 2 6 100 GOI Abrolhos Ba 2025 1 30.94 sS 4.7 HD 5.0B 7 10 2/ 9 100 GOI Abrolhos Ba (Comet altitude 8°, Sun altitude -15°.) 2025 1 29.92 sS 4.9 HD 5.0B 7 7 2/ 7 95 GOI Maceió Alagoas (Comet altitude 7°, Sun altitude -14°. Clouds.) 2025 1 29.45 I 4.3 AA 0.0E 1 10 SEA Cowra, NSW 2025 1 28.92 S 4.7 HD 5.0B 7 6 2/ 7 95 GOI Salvador - Bahia (Comet altitude 9°, Sun altitude -13°. Light polution.) 2025 1 27.93 sS 4.5 HD 5.0B 7 8 3 8 92 GOI Atlantic Ocean, W 35.8 deg., S 15.9 deg. (Comet altitude 8°, Sun altitude -14°.) 2025 1 27.45 I 4.1 AA 0.0E 1 15 SEA Cowra, NSW 2025 1 27.41 M 4.6 TK 7.0B 15 7.5 2 8 87 WYA Walcha, NSW (Twilight. Low altitude 10.1°, Sun alt -13.5°. Coma diffuse and opaque, no central condensation visible due to nucleus disintegration. Tail fanning out to 2 degrees in width at its extremity. Tail opaque for first 4° of its length then turns semi-opaque. Naked eye the tail was traced to 13° and was 3 degrees wide at its extremity.) 2025 1 26.45 I 4.1 AA 0.0E 1 16 SEA Cowra, NSW (Tail appeared fainter and sky conditions were somewhat hazy. In 25x100B, outline of "head" region appeared less distinct.) 2025 1 24.45 I 3.5 AA 0.0E 1 & 20 SEA Cowra, NSW 2025 1 22.44 I 3.2 AA 0.0E 1 22 SEA Cowra, NSW 2025 1 21.96 aI 2.0 HD 0.7E 1 10 3 15 90 GOI Araçatuba 2025 1 21.96 aS 2.2 HD 5.0B 7 8 4 10 90 GOI Araçatuba (Curved fan-shaped tail pointing north in PA 75 deg. Comet altitude 7°, Sun altitude -11°.) 2025 1 20.96 sS 2.4 HD 5.0B 7 4 4/ 6 105 GOI Araçatuba (Comet altitude 6.5°, Sun altitude -11°, clouds. Easily visible with naked eye, coma appears to have disintegrated due to the rapid loss of brightness and decrease in the degree of condensation.) 2025 1 20.44 I 2 AA 0.0E 1 5 SEA Cowra, NSW 2025 1 20.42 10.0B 25 2.5 SEA Cowra, NSW (No condensation visible in 25x100B. Tail became clearly visible with naked eye as sky darkened.) 2025 1 18.96 sI -0.9 HD 0.7E 1 8 4 100 GOI Araçatuba 2025 1 18.96 sS -0.8 HD 5.0B 7 2 7 4 100 GOI Araçatuba 2025 1 18.96 sS -0.6 HD 10.0B 20 2 7 3 100 GOI Araçatuba (Comet altitude 4°, Sun altitude -11°, clouds.) 2025 1 18.41 10.0B 25 8 1.2 SEA Cowra, NSW 2025 1 18.41 I 0 :AA 0.0E 1 SEA Cowra, NSW (Fine detail visible in the more intense section of tail [near coma], with 25x100B. At least one degree of tail faintly visible NE after head had set.) 2025 1 17.41 I -1 : 10.0B 25 8 & 1 SEA Cowra, NSW (Very impressive in 25x100B. Head and tail became visible naked eye around 10hrs UT.) 2025 1 16.41 5.0B 10 8 & 0.5 SEA Cowra, NSW (Easily visible, but appeared tiny in 5 degree binocular field.) 2025 1 16.36 wI -1.5:YG 6.6R 10 8 0.3 75 YOS Katahama coast, Numazu City, Shizuoka 2025 1 15.93 sI -1.2 HD 10.0B 20 1.5 8 0.2 70 GOI Araçatuba 2025 1 15.93 sI -1.4 HD 5.0B 7 1.5 8 0.3 70 GOI Araçatuba (Comet altitude 5°, Sun altitude -3°.) 2025 1 15.74 wI -1.5:TK 5.0B 10 1.2 8/ 0.25 80 GON Gamoniteiro - Sierra del Aramo, Asturias (Very low altitude 3°. Solar elongation 9 deg. End of civil twilight.) 2025 1 8.34 sM 0.2:HD 5.0B 7 2.5 8 0.2 265 GOI Araçatuba (Comet altitude 4°, Sun altitude -7°, clouds.) 2025 1 7.34 sM 0.7:HD 5.0B 7 3 8 0.3 260 GOI Araçatuba (Comet altitude 5°, Sun altitude -7°, clouds.) 2025 1 6.33 aI 0.9 HD 0.7E 1 9 GOI Araçatuba 2025 1 6.33 aM 1.0 HD 5.0B 7 3.5 8 0.5 255 GOI Araçatuba (Comet altitude 4.5°, Sun altitude -9°.) 2025 1 5.75 M 1.5 TK 7.0B 15 1.8 7/ 15m 252 WYA Walcha, NSW (Twilight. Low altitude 2.5°, Sun alt -11.1°. Coma white, and tail golden-hued in colour. Comet was able to be easily seen in binoculars deep into twilight until 18:34 UT at an altitude of 9.2°, with Sun -5.0° in altitude.) 2025 1 5.34 aM 1.6 HD 5.0B 7 3.5 8 0.5 250 GOI Araçatuba 2025 1 5.34 aM 1.8 HD 10.0B 20 2.5 8 0.3 250 GOI Araçatuba (Comet altitude 6°, Sun altitude -9°, comet visible with naked eye.) 2025 1 4.33 sM 2.1:HD 5.0B 7 3 8 0.5 250 GOI Araçatuba (Comet altitude 4°, Sun altitude -11°, too many clouds.) 2025 1 4.33 sM 2.2:HD 10.0B 20 2 8 0.3 250 GOI Araçatuba (Comet altitude 4°, Sun altitude -11°, clouds.) 2024 12 31.32 M 4.9 HD 10.0B 20 2 7/ 0.2 240 GOI Araçatuba (Comet altitude 5°, comparison stars altitude 5°, Sun altitude -12°.) 2024 12 30.32 aM 5.1 HD 10.0B 20 2 7/ 0.2 235 GOI Araçatuba (Comet altitude 5°, comparison stars altitude 4°.) 2024 12 29.32 aS 5.3 HD 10.0B 20 2 7 0.2 240 GOI Araçatuba (Comet altitude 5°, comparison stars altitude 6°.) 2024 12 26.72 M 6.0 TK 7.0B 15 2.3 7 10m 234 WYA Walcha, NSW (Moonlight. Low altitude 3.6°. Slight twilight interference. Sun alt. -15.2°. Faint tail visible. Comet was still faintly visible in binoculars in twilight at 17:41 UT with Sun altitude at -13.3°.) 2024 12 23.72 M 6.5 TK 7.0B 15 2.2 7 15m 232 WYA Walcha, NSW (Moonlight. Low altitude 2.5°. Slight twilight interference. Sun alt. -16.7°. Faint tail visible. Comet was visible in binoculars even when I left my observing site at 17:38 UT with Sun altitude at -13.7°.) 2024 10 30.39 M 11.9 AQ 25.0L 125 0.6 4/ WYA Walcha, NSW (Low altitude 7.9°. Slight twilight interference. Sun altitude -16.5°. Semi-opaque outer coma, close to bright star but resolvable. Poor seeing.) 2024 10 22.40 M 12.5 AQ 25.0L 125 0.5 5/ WYA Walcha, NSW (Low altitude 10.6°. Opaque centre, sometimes stellar pseudo-nucleus visible in good seeing.)