* * * * * P/2020 M3 (ATLAS) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2021 1 16.85 S 10.5 TK 20.3T 77 4 2 GON Collada de la Cobertoria, Asturias 2021 1 13.830 S 12.7:AQ 25.4J 88 1.8 2 BOU Lauwersoog (Very faint and diffuse. Comet close to star of magn. 12.3.) 2021 1 13.83 S 10.3 TK 20.3T 77 5 2 GON Collada de la Cobertoria, Asturias 2021 1 7.89 S 10.5 TK 20.3T 100 5 2 GON Matadeón de los Oteros, León 2020 12 18.92 S 10.8:TK 35.6T 80 & 3 2 SCH Bussloo (Comet in starrich field.) 2020 12 16.81 S 9.7 TK 20.3T 77 6 3 GON Sierra de Tineo, Asturias 2020 12 14.50 S 10.3 TJ 40.0L 75 2.9 5 YOS Mt. Hanadate, Ibaraki (The central condensation became stronger.) 2020 12 9.47 M 9.4 TK 25.0L 40 5 4/ WYA Walcha, NSW (Coma diffuse and extended. Centre opaque and moderately condensed. Altitude 15.2°.) 2020 12 9.12 S 8.5 TK 10.0B 20 7 2 GOI Araçatuba 2020 12 8.96 S 9.6 TK 20.3T 77 6 3 GON Matadeón de los Oteros, León 2020 12 5.776 S 8.5 TK 15.6L 29 7 2 BOU Sint Annen 2020 11 28.23 S 7.8 TK 10.0B 25 12 2/ GON Collado del Fresno - Aramo, Asturias 2020 11 24.21 S 7.8 TK 10.0B 20 12 2/ GOI Araçatuba 2020 11 22.972 S 8.2 TK 8.0B 15 8 3 DIJ Burlage 2020 11 22.963 S 7.8 HI 8.0B 15 10 2/ BOU Sint Annen 2020 11 22.93 S 8.6 TK 20.0L 42 & 7 3 SCH Eerbeek 2020 11 22.28 S 7.7 TK 10.0B 20 12 2/ GOI Araçatuba 2020 11 22.21 S 7.6 TK 10.0B 25 15 3 GON Collado del Fresno - Aramo, Asturias 2020 11 22.20 S 7.3 TK 5.0B 10 15 3 GON Collado del Fresno - Aramo, Asturias 2020 11 21.52 S 8.6 TJ 40.0L 36 4.5 2/ YOS Mt. Hanadate, Ibaraki (Very diffuse and hard to see.) 2020 11 20.92 S 8.3 TK 20.0L 42 & 8 3 SCH Eerbeek 2020 11 20.908 S 8.0 TK 8.0B 15 6 3 DIJ Burlage 2020 11 20.12 S 7.6 TK 10.0B 20 12 2/ GOI Araçatuba 2020 11 19.955 S 7.8 TK 8.0B 15 8 4 DIJ Burlage 2020 11 18.94 S 7.8 TT 10.0B 25 10 2/ FIL Jerzmanowice 2020 11 18.22 S 7.4 TK 10.0B 25 15 3 GON Collado del Fresno - Aramo, Asturias 2020 11 18.13 S 8.7 TK 5.0B 7 5 5 BIV 2020 11 18.11 S 9.5 TK 40.7L 72 4 5 BIV 2020 11 18.00 S 7.2 TK 5.0B 10 15 3 GON Collado del Fresno - Aramo, Asturias 2020 11 16.967 S 7.8 TK 8.0B 15 6 3/ DIJ Burlage 2020 11 15.965 S 7.8 TK 8.0B 15 5.7 3/ DIJ Burlage 2020 11 15.50 M 7.7 TK 5.0R 10 9.3 3/ WYA Walcha, NSW (Very diffuse, close to Bellatrix but easily discernible.) 2020 11 15.204 S 7.8 HI 15.6L 24 10 2/ BOU Westerwijtwerd 2020 11 15.16 S 7.4 TK 5.0B 7 14 2 GOI Araçatuba 2020 11 15.15 S 7.6 TK 10.0B 20 12 2/ GOI Araçatuba 2020 11 14.52 S 7.6 TK 5.0R 10 12.5 3 WYA Walcha, NSW (Very diffuse.) 2020 11 14.24 S 7.7 TK 10.0B 25 13 3 GON Collado del Fresno - Aramo, Asturias 2020 11 12.943 S 7.6 TK 8.0B 15 12 1/ DIJ Burlage 2020 11 12.926 S 7.9 HI 8.0B 15 8 2/ BOU Westerwijtwerd 2020 11 12.91 S 8.4 TK 20.0L 42 & 8 2 SCH Eerbeek 2020 11 10.47 M 8.1 TK 25.0L 40 8 5 WYA Walcha, NSW (Diffuse coma, gradually brightening to centre. Enhances in Swan Band filter. Altitude 18.2°.) 2020 11 8.921 S 7.7 HI 8.0B 15 8 2 BOU Westerwijtwerd (Some interference from nearby η ORI. Altitude 18°.) 2020 11 8.906 S 8.5 TK 15.5L 42 4 1 DIJ Burlage 2020 11 8.47 S 7.8 AA 10.0B 25 12 3 SEA Cowra, NSW 2020 11 7.12 S 7.3 TK 5.0B 7 18 2 GOI Araçatuba 2020 11 7.11 S 7.6 TK 10.0B 20 14 2/ GOI Araçatuba 2020 11 6.08 S 7.7 TK 10.0B 20 12 2/ GOI Araçatuba 2020 11 2.70 M 9.1 TK 25.0L 40 6.5 4 WYA Walcha, NSW (Moonlight. Enhances in Swan Band filter. Very diffuse and transparent outer coma with small opaque central condensation.) 2020 10 27.066 S 7.7 TK 8.0B 15 8 3/ DIJ Burlage 2020 10 26.17 S 8.1 TK 10.0B 20 10 2/ GOI Araçatuba (Moonlight.) 2020 10 24.12 S 8.3 TK 20.3T 77 12 2/ GON Alto del Castro, León 2020 10 22.063 S 8.3 TK 8.0B 15 7 2/ DIJ Burlage 2020 10 20.80 S 10.1 TJ 40.0L 75 3.2 2/ YOS Mt. Tsukuba, Ibaraki (The condensation was weaker than expected. Diffuse and hard to see.) 2020 10 18.46 S 7.8 AA 10.0B 25 14 2 SEA Cowra, NSW 2020 10 18.17 S 8.6 TK 10.0B 20 7 2 GOI Araçatuba 2020 10 17.21 S 8.8 TK 10.0B 20 5 2 GOI Araçatuba 2020 10 16.14 S 8.3 TK 20.3T 77 9 2/ GON Pandorado, León (Altitude 23°.) 2020 10 13.53 M 8.2 TK 5.0B 7 15 3/ WYA Walcha, NSW (Very diffuse, slightly brighter at centre.) 2020 10 12.48 S 7.4 AA 5.0B 10 20 2 SEA Cowra, NSW 2020 10 12.25 S 8.9 TK 22.0L 60 5 2/ GOI Araçatuba 2020 10 11.08 S 8.9 TK 20.3T 77 6 2 GON Pandorado, León 2020 10 10.47 S 8.6 AA 10.0B 25 16 1 SEA Cowra, NSW (Somewhat enhanced using Swan Band filter.) 2020 10 10.47 S 7.6 TK 5.0B 7 18 2/ WYA Walcha, NSW (Coma very diffuse and extended. Slight brightening to centre. Altitude 16.2°.) 2020 10 9.52 M 8.8 TK 25.0L 40 8.5 4 WYA Walcha, NSW (Diffuse coma with opaque centre.) 2020 9 26.29 S 10.2 TK 22.0L 60 4 2/ GOI Araçatuba 2020 9 24.21 S 10.3 TK 22.0L 60 3 2 GOI Araçatuba 2020 9 22.63 M 9.4 TK 25.0L 40 7.5 3/ WYA Walcha, NSW (Enhances in Swan Band filter. Very diffused and extended with slight to moderate brightening at centre.) 2020 9 8.50 S 10.3 TK 25.0L 40 6.8 2 WYA Walcha, NSW (Very diffuse round smudge. Altitude 18.4°. Enhances in Swan Band filter.) 2020 8 28.75 M 10.5 TK 40.0L 59 5.5 3/ WYA Walcha, NSW (Very diffuse, enhances slightly in Swan Band filter.) 2020 8 26.75 M 14.5 AQ 40.0L 261 0.5 5 WYA Walcha, NSW (Diffuse, opaque centre. Easy to see despite bright star to the NW.)