* * * * * C/2020 S3 (Erasmus) * * * * *

Year Mn Day    MM  Mag Ref Scope Pwr coma  DC tail p.a. Obs  Site
2020 12  9.32   S  5.6 HD  10.0B  20   1   8            GOI  Araçatuba
(Comet altitude 5°, Sun -10°, nautical twilight, comparison stars at the same comet altitude.) 
2020 11 30.30   M  6.4 TK  10.0B  20   5   6/           GOI  Araçatuba
(Clouds. Moonlight. Comet altitude 11°, Sun -15°.)
2020 11 29.30  sM  6.5 TK  10.0B  20   5   7   0.4 270  GOI  Araçatuba
(Moonlight. Comet altitude 12°, Sun -15°.)
2020 11 28.30   M  6.7 TK  10.0B  20   4   7            GOI  Araçatuba
(Clouds. Comet altitude 13°, Sun -15°.)
2020 11 28.25   S  6.8 TK  10.0B  25   3   7/  0.4 270  GON  Collado del Fresno - Aramo, Asturias
(Zodiacal light. Altitude 4°.)
2020 11 25.30   M  7.0 TK  10.0B  20   4   7   0.2 270  GOI  Araçatuba
2020 11 23.233  S  7.0 TK   8.0B  15   5   6            DIJ  Burlage
(Comet altitude 6° with Sun at -13°.)
2020 11 22.30   S  7.2 HD   5.0B   7   5   6            GOI  Araçatuba
2020 11 22.29   M  7.2 HD  10.0B  20   4   7   0.4 275  GOI  Araçatuba
2020 11 22.24   S  7.0 TK  10.0B  25   4   7   1.4 280  GON  Collado del Fresno - Aramo, Asturias
(Zodiacal light. Altitude 10°.)
2020 11 21.83   S  6.9 TJ   7.0R  10   3   6            YOS  Mt. Tsukuba, Ibaraki
2020 11 21.83   M  7.1 TJ  40.0L  36  2.9  7/           YOS  Mt. Tsukuba, Ibaraki
(Very strongly condensed, bright and easy to see.)
2020 11 20.30   S  7.3 HD   5.0B   7   5   6            GOI  Araçatuba
2020 11 20.29   S  7.4 HD  10.0B  20   4   7  0.25 285  GOI  Araçatuba
2020 11 18.24   S  6.8 TK   5.0B  10   8   7            GON  Collado del Fresno - Aramo, Asturias
(Zodiacal light. Altitude 12°.)
2020 11 18.23   S  7.1 TK  10.0B  25   6   6/  0.6 280  GON  Collado del Fresno - Aramo, Asturias
2020 11 15.70   M  7.7 TK   7.0B  15  3.8  6/           WYA  Walcha, NSW
(Coma small, bright star-like pseudo-nucleus at centre. Through the 40.0L at 59x there is a faint tail visible,
traced to 49’ in length in p.a. 275 deg. Altitude 13.9°.)
2020 11 15.30   S  7.8 TK  10.0B  20   4   6            GOI  Araçatuba
2020 11 15.214  M  7.7 HI  15.6L  29  3.5  5            BOU  Westerwijtwerd
(Low altitude 10.0°.)
2020 11 14.70   S  7.3 AA  10.0B  25                    SEA  Cowra, NSW
(Some enhancement through Swan Band filter.)
2020 11 14.23   S  6.9 TK   5.0B  10   8   6/           GON  Collado del Fresno - Aramo, Asturias
(Brighter than expected. Zodiacal light. Altitude 15°.)
2020 11 14.22   S  7.3 TK  10.0B  25   6   6   0.8 280  GON  Collado del Fresno - Aramo, Asturias
2020 11 13.218  S  7.3 TK   8.0B  15  5.5  4            DIJ  Burlage
(Comet 13° altitude.)
2020 11  2.69   M 10.1 TK  25.0L  74   2   3/           WYA  Walcha, NSW
(Moonlight. Enhances in Swan Band filter. Opaque centre, moderately condensed. Semi-transparent extended outer coma. Altitude 16.0°.)
2020 10 27.184  S 10.7 TK  15.5L  42  2.5  2/           DIJ  Burlage
2020 10 25.32   S  9.9 TK  22.0L  60   4   3/           GOI  Araçatuba
2020 10 24.14   S  9.5 TK  20.3T  77   6   2/           GON  Alto del Castro, León
2020 10 23.178  S 10.4 AQ  25.4J  58   3   2/           BOU  Westerwijtwerd
2020 10 20.82   S 12.5 TA  40.0L 144  1.7  0            YOS  Mt. Tsukuba, Ibaraki
(Diffuse.)
2020 10 16.21   S 10.1 TK  20.3T  77   6   1/           GON  Pandorado, León
(Brighter than expected. Large, faint outer coma. Followed for a 60-min period. Altitude 33°.)