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* * * * * C/2020 J1 (SONEAR) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2022 4 5.45 S 14.9 AQ 40.0L 182 0.5 3 WYA Walcha, NSW (Altitude 15.5°. Visible in good seeing periods.) 2022 2 9.75 S 14.1 AQ 25.0L 179 1.3 3 WYA Walcha, NSW (Difficult. Diffuse.) 2021 9 8.40 S 13.8 AQ 40.0L 182 1.0 3/ WYA Walcha, NSW (Low altitude 12.2°. Zodiacal light and glare from Venus interference. Difficult due to scintillation. Faint stellar pseudo-nucleus visible at times.) 2021 8 31.40 M 13.8 AQ 40.0L 108 1.0 5/ WYA Walcha, NSW (Diffuse, pseudo-nucleus visible in good seeing.) 2021 8 28.39 M 13.6 AQ 40.0L 108 1.3 6 WYA Walcha, NSW (No enhancement in Swan Band filter. Zodiacal light interference.) 2021 8 10.88 S 11.4 TK 20.3T 133 3.5 2 GON Alto del Castro, León 2021 8 10.38 M 14.3 AQ 40.0L 182 0.5 6 WYA Walcha, NSW (Close to bright star but resolvable. Opaque outer coma, stellar pseudo-nucleus visible.) 2021 8 6.44 M 13.2 AQ 40.0L 108 1.5 6 WYA Walcha, NSW (Opaque inner coma, extended and transparent outer coma, faint stellar pseudo-nucleus visible.) 2021 8 5.89 S 11.2 TK 20.3T 100 5 1/ GON Alto del Castro, León 2021 7 30.45 M 13.8 AQ 40.0L 108 0.9 6 WYA Walcha, NSW (Stellar pseudo-nucleus visible, opaque centre.) 2021 7 29.40 M 13.8 AQ 40.0L 108 1.0 5/ WYA Walcha, NSW (Diffuse transparent outer coma, faint stellar pseudo-nucleus.) 2021 7 27.90 S 11.3 TK 20.3T 77 4 1/ GON Alto del Trichero, León 2021 7 13.93 S 11.1 TK 20.3T 100 4 2 GON Alto del Trichero, León 2021 7 12.41 M 13.4 AQ 40.0L 108 1.0 6 WYA Walcha, NSW (Stellar pseudo-nucleus visible at centre, opaque inner coma, transparent outer coma.) 2021 7 8.92 S 11.2 TK 20.3T 100 4 2/ GON Alto del Castro - Aralla, León 2021 7 5.50 M 13.9 AQ 40.0L 182 0.6 6 WYA Walcha, NSW (Diffuse, opaque centre, faint stellar pseudo-nucleus visible in good seeing.) 2021 7 4.95 S 11.2 TK 20.3T 77 5 2/ GON La Camperona, León 2021 7 4.37 M 13.9 AQ 25.0L 125 1.3 4 WYA Walcha, NSW (Diffuse, opaque coma, hint of elongation to the East approximately.) 2021 6 30.39 M 13.7 AQ 25.0L 125 1.0 4/ WYA Walcha, NSW (Diffuse, small opaque inner coma.) 2021 6 27.35 M 13.6 AQ 40.0L 108 0.8 6 WYA Walcha, NSW (Coma dims in Swan Band filter.) 2021 6 15.48 M 13.6 AQ 40.0L 182 1.8 6 WYA Walcha, NSW (Does not enhance in Swan Band filter.) 2021 6 15.12 S 12.3 AU 22.0L 160 1.5 5 GOI Araçatuba 2021 6 12.94 S 12.6 AQ 40.7L 72 1.2 4 BIV 2021 6 9.97 S 11.6 TK 20.3T 77 5 3 GON Alto del Castro - Aralla, León 2021 6 7.93 S 13.2 AQ 40.7L 72 1.0 5 BIV 2021 6 6.38 M 13.1 AQ 40.0L 59 2.0 6 WYA Walcha, NSW (Does not enhance in Swan Band filter.) 2021 6 4.98 S 11.6 TK 20.3T 77 5 2/ GON Alto del Castro - Aralla, León 2021 5 31.40 M 12.9 AQ 40.0L 108 1.1 6 WYA Walcha, NSW (Coma appears elongated to the East approximately, stellar pseudo-nucleus visible.) 2021 5 19.58 M 12.6 AQ 40.0L 59 1.8 5/ WYA Walcha, NSW (Opaque centre, semi-transparent outer coma. Appears to be elongated to the East approximately.) 2021 5 17.50 M 13.0 AQ 40.0L 108 1.5 6 WYA Walcha, NSW (Stellar pseudo-nucleus visible, opaque inner coma.) 2021 5 13.45 M 12.9 AQ 40.0L 108 1.0 5/ WYA Walcha, NSW (Dims in Swan Band filter. Opaque centre with faint pseudo-nucleus visible in good seeing, semi-transparent outer coma.) 2021 4 19.68 M 12.9 AQ 40.0L 108 0.7 4 WYA Walcha, NSW (Diffuse with opaque centre. Dims in Swan Band filter.) 2021 4 13.69 M 13.3 AQ 40.0L 182 0.9 5/ WYA Walcha, NSW (No enhancement in Swan Band filter. Sometimes shows faint stellar pseudo-nucleus.) 2021 4 12.67 M 13.2 AQ 40.0L 108 0.6 6 WYA Walcha, NSW (Faint stellar pseudo-nucleus, opaque outer coma. No enhancement in Swan Band filter.) 2021 4 10.68 M 13.2 AQ 40.0L 182 1.0 4/ WYA Walcha, NSW (Opaque inner coma fading to edges.) 2021 3 25.74 M 13.4 AQ 40.0L 261 0.4 6 WYA Walcha, NSW (Faint stellar pseudo-nucleus visible, outer coma semi-opaque.) 2021 3 24.70 M 13.3 AQ 40.0L 182 0.5 5 WYA Walcha, NSW (No enhancement in Swan Band filter. Diffuse, opaque centre.) 2020 10 10.40 S 14.9 AQ 40.0L 261 0.3 3 WYA Walcha, NSW (Difficult, small and diffuse.)