|
* * * * * C/2020 R4 (ATLAS) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2021 6 9.94 S 11.5 TK 20.3T 77 6 1/ GON Alto del Castro - Aralla, León 2021 6 7.92 S 13.3 HS 40.7L 72 1.0 3 BIV 2021 6 6.39 M 14.0 AQ 40.0L 108 1.3 3/ WYA Walcha, NSW (Diffuse, slight brightening to centre. Dims in Swan Band filter.) 2021 6 5.93 S 12.4 AQ 40.7L 72 1.5 2 BIV 2021 6 4.94 S 11.7 TK 20.3T 77 6 1/ GON Alto del Castro - Aralla, León 2021 5 17.48 M 12.4 AQ 40.0L 59 3.5 2 WYA Walcha, NSW (Very diffuse, weak brightening at centre.) 2021 5 14.928 S 11.2 AQ 15.5L 42 2.7 1/ DIJ Burlage 2021 5 13.42 S 11.6 AQ 40.0L 59 3.8 3 WYA Walcha, NSW (Dims in Swan Band filter. Very diffuse, appears slightly elongated to the East approximately.) 2021 5 12.990 S 10.9 AQ 15.5L 42 3 2 DIJ Burlage 2021 5 12.51 S 10.1 AA 10.0B 25 SEA Cowra, NSW 2021 5 9.44 S 9.8 AA 10.0B 25 4 SEA Cowra, NSW (Slight enhancement using Swan Band filter.) 2021 5 8.08 S 9.6 TK 20.3T 77 8 3/ GON Collado del Fresno - Aramo, Asturias 2021 5 7.92 S 10.6 TK 20.0L 42 5 2 SCH Eerbeek 2021 5 7.917 S 9.9 AQ 15.5L 42 4 2/ DIJ Burlage 2021 5 5.936 S 10.0 AQ 15.5L 42 4 4 DIJ Burlage 2021 5 3.92 S 8.3 TK 10.0B 25 10 3/ GON Collada de Olleros de Alba, León 2021 5 3.89 S 9.4 TK 20.3T 77 7 3/ GON Collada de Olleros de Alba, León 2021 5 3.89 S 9.3 TT 25.0L 60 5 3 FIL Jerzmanowice 2021 5 2.906 S 10.0 AQ 15.5L 42 6 3/ DIJ Burlage 2021 5 2.90 S 9.4 TK 20.0L 42 & 5 3 SCH Eerbeek 2021 5 2.90 S 9.4 TK 40.7L 72 4 4 BIV 2021 5 2.52 S 9.2 AA 10.0B 25 6 SEA Cowra, NSW 2021 5 1.94 S 9.3 TK 20.0L 42 & 6 3 SCH Eerbeek 2021 4 21.24 S 9.2 TK 22.0L 60 8 2/ GOI Araçatuba 2021 4 20.097 S 10.3 AQ 15.5L 42 4 3/ DIJ Burlage (Sun at -15.6° altitude.) 2021 4 19.06 S 9.8:TK 20.0L 42 & 7 1 SCH Eerbeek (Very diffuse. Difficult observation.) 2021 4 19.71 M 9.9 TK 40.0L 59 4.4 4 WYA Walcha, NSW (Enhances in Swan Band filter. Faint background stars in coma. Outer coma extended. Semi-transparent inner coma.) 2021 4 17.081 S 10.5 AQ 25.4J 47 4 1/ BOU Westerwijtwerd 2021 4 17.04 S 7.8 TK 10.0B 25 15 3 GON Alto del Torno - Sierra Benzúa, Asturias 2021 4 17.03 S 7.7 TK 5.0B 10 15 3/ GON Alto del Torno - Sierra Benzúa, Asturias 2021 4 16.06 S 10.2:TK 20.0L 80 & 3 1 SCH Eerbeek (Very diffuse. Difficult observation.) 2021 4 14.962 S 10.5 AQ 15.5L 42 2.3 2/ DIJ Burlage 2021 4 13.70 M 10.4 TK 40.0L 59 3.9 3/ WYA Walcha, NSW (Very diffuse, faint stars in coma. Enhances in Swan Band filter.) 2021 4 12.69 M 10.3 TK 40.0L 59 5.5 3/ WYA Walcha, NSW (Coma large and transparent. Faint opaque extension within coma to the West approximately. Enhances in Swan Band filter.) 2021 4 12.12 S 7.9 TK 10.0B 25 12 3/ GON Collado del Fresno - Aramo, Asturias 2021 4 12.10 S 10.0:TK 20.0L 42 & 3 2 SCH Eerbeek (Comet in starrich field.) 2021 4 12.069 S 10.4 AQ 15.5L 42 2.8 4 DIJ Burlage 2021 4 12.03 S 9.3 TT 25.0L 60 3 2/ FIL Jerzmanowice 2021 4 11.31 S 9.0 TK 10.0B 20 8 2 GOI Araçatuba 2021 4 11.30 S 9.1 TK 22.0L 60 7 3 GOI Araçatuba 2021 4 10.72 M 9.6 TK 40.0L 59 2 4 WYA Walcha, NSW (Diffuse, opaque centre. Inner coma slightly elongated to the West. Coma enhances well in Swan Band filter.) 2021 4 10.33 S 9.0 TK 22.0L 60 8 3 GOI Araçatuba 2021 4 7.052 S 10.4 AQ 15.5L 42 2.0 2/ DIJ Burlage 2021 4 6.15 S 8.1 TK 10.0B 25 10 3/ GON Alto del Castro - Aralla, León 2021 4 6.14 S 8.5 TK 20.3T 77 7 3 GON Alto del Castro - Aralla, León 2021 4 3.31 S 10.0 TK 22.0L 60 4 3 GOI Araçatuba 2021 3 25.75 M 9.3 TK 40.0L 59 3.4 5 WYA Walcha, NSW (Opaque centre, well condensed. Semi-transparent outer coma. Faint hint of tail to the West approximately, about 3’ in length.) 2021 3 24.71 M 9.5 TK 40.0L 59 3.5 5/ WYA Walcha, NSW (Enhances well in Swan Band filter. Small stellar pseudo-nucleus visible, opaque centre fading to edges. Altitude 19.4°.) 2021 3 22.20 S 8.3 TK 20.3T 77 8 3 GON Collada de Aralla, León (Altitude 20°.) 2021 3 21.33 S 10.1 TK 22.0L 60 3.5 2 GOI Araçatuba 2021 3 13.21 S 8.4 TK 20.3T 77 6 3 GON Alto del Castro - Aralla, León (Altitude 12°.)