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* * * * * C/2021 T4 (Lemmon) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2023 10 3.39 S 12.9 AQ 40.0L 108 1.5 3 WYA Walcha, NSW (Low altitude 13.4°. Diffuse. Zodiacal light interference.) 2023 9 9.44 M 11.5 AQ 40.0L 59 2.9 3/ WYA Walcha, NSW (Star in coma. Diffuse coma. Enhances in Swan Band filter.) 2023 8 21.86 S 9.4 TK 20.3T 77 6 2/ GON Cueto Rosales, León (Astronomical twilight. Some moonlight interference. Altitude 11°.) 2023 8 11.42 S 9.4 TK 7.0B 15 9 3/ WYA Walcha, NSW (Opaque centre, diffused outer coma. Sky slightly hazy.) 2023 8 7.89 S 9.1 TK 20.3T 77 5 2/ GON Alto del Castro, León (Astronomical twilight. Altitude 8°.) 2023 8 6.98 S 9.1 TK 10.0B 20 5 2/ GOI Araçatuba 2023 7 27.21 S 8.7 TK 10.0B 20 6 2/ GOI Araçatuba 2023 7 25.19 S 8.6 TK 10.0B 20 6 3 GOI Araçatuba 2023 7 22.52 M 9.0 TK 7.0B 15 11 3/ WYA Walcha, NSW (Diffuse extended outer, opaque centre, weakly condensed.) 2023 7 21.49 S 8.4 AA 10.0B 25 10 SEA Cowra, NSW 2023 7 20.41 M 9.0 TK 7.0B 15 8 4 WYA Walcha, NSW (Large diffuse coma, close to stars but resolvable. Opaque centre.) 2023 7 20.21 S 8.6 TK 10.0B 20 6 3 GOI Araçatuba 2023 7 16.50 S 8.3 AA 10.0B 25 10 SEA Cowra, NSW (Little change through Swan Band filter.) 2023 7 15.12 S 9.2 TK 10.0B 20 4 3 GOI Araçatuba 2023 7 14.45 M 8.9 TK 7.0B 15 8 3/ WYA Walcha, NSW (Large diffuse coma.) 2023 6 24.31 S 10.6 TK 22.0L 160 3 3 GOI Araçatuba 2023 6 24.06 S 9.8 TK 25.4L 40 & 7 7 SCH Tivoli, Namibia (Elliptical coma in p.a. 260 deg.) 2023 6 23.06 S 9.8 TK 25.4L 40 & 7 7 SCH Tivoli, Namibia (Elliptical coma in p.a. 250 deg.) 2023 6 22.17 S 10.2 TK 25.4L 40 & 6 6 SCH Tivoli, Namibia (Elliptical coma in p.a. 220 deg.) 2023 6 21.11 S 10.4 TK 25.4L 40 & 6 6 SCH Tivoli, Namibia (Elliptical coma.) 2023 6 20.09 S 10.6 TK 25.4L 40 5 6 SCH Tivoli, Namibia (Elliptical coma in p.a. 235 deg.) 2023 6 19.06 S 10.6 TK 25.4L 40 6 6 SCH Tivoli, Namibia (Elliptical coma in p.a. 230 deg.) 2023 6 18.09 S 10.6 TK 25.4L 40 6 5 SCH Tivoli, Namibia (slightly elliptical coma) 2023 6 17.08 S 10.5 TK 25.4L 40 5 5 SCH Tivoli, Namibia 2023 6 16.74 M 10.2 AQ 40.0L 59 4.3 5 WYA Walcha, NSW (No enhancement in Swan Band filter. Opaque centre, hint of faint tail to the SW approximately.) 2023 6 16.10 S 10.5 TK 2 5.4L 40 5 5 SCH Tivoli, Namibia 2023 6 15.06 S 10.6 TK 25.4L 40 5 5 SCH Tivoli, Namibia 2023 6 14.05 S 10.8 TK 25.4L 40 5 5 SCH Tivoli, Namibia 2022 12 26.51 M 14.8 AQ 40.0L 182 0.6 4 WYA Walcha, NSW (Close to star, diffuse, poor seeing.) 2022 12 20.46 M 14.8 AQ 40.0L 182 1.1 4/ WYA Walcha, NSW (Diffuse, opaque centre.) 2022 11 23.45 M 14.5 AQ 40.0L 182 0.7 4 WYA Walcha, NSW (Opaque inner coma, transparent outer coma.) 2022 10 29.66 M 15.3 AQ 40.0L 261 0.5 4/ WYA Walcha, NSW (Difficult. Visible in periods of good seeing.)