* * * * * C/2017 B3 (LINEAR) * * * * *

Year Mn Day    MM  Mag Ref Scope Pwr coma  DC tail p.a. Obs  Site
2020 10 13.47   M 15.3 AQ  40.0L 182  0.8  3/           WYA  Walcha, NSW
(Difficult, very small, visible in good seeing.)
2019 12 28.46   S 14.8 AQ  40.0L 261  0.4  3/           WYA  Walcha, NSW
(Diffuse, slightly brighter inner coma, Sometimes appears faintly stellar at centre.)
2019 12 27.47   M 14.8 AQ  40.0L 261  0.3  5/           WYA  Walcha, NSW
(Small and very diffuse outer coma, small opaque inner coma, sometimes appears faintly stellar.)
2019 11 19.43   S 14.7 AQ  40.0L 261  0.5  3/           WYA  Walcha, NSW
(Coma diffuse, small coma, hazy with slightly brighter centre.)
2019 10 19.50   M 14.6 AQ  40.0L 108  0.5  6            WYA  Walcha, NSW
(Coma small and diffuse with a faint stellar pseudo-nucleus visible in good seeing.)
2019 10 18.42   M 14.6 AQ  40.0L 108  0.9  5/           WYA  Walcha, NSW
(Stellar pseudo-nucleus in good seeing, surrounded by an opaque and hazy outer coma.)
2019 10  3.68   M 14.5 AQ  40.0L 108   1   5/           WYA  Walcha, NSW
(Sometimes appears faintly stellar in good seeing, hazy outer coma, opaque inner coma.)
2019 10  2.69   M 14.4 AQ  40.0L 108   1   5/           WYA  Walcha, NSW
(Small diffuse coma, opaque centre, stellar pseudo-nucleus visible in good seeing periods.)
2019 10  1.42   M 14.5 AQ  40.0L 108  0.9  6            WYA  Walcha, NSW
(Faint stellar pseudo-nucleus, diffuse outer coma.)
2019  9 24.55   M 14.4 AQ  40.0L 108  0.9  6            WYA  Walcha, NSW
(Faint stellar pseudo-nucleus, small coma with opaque inner coma.)
2019  9 23.54   M 14.4 AQ  40.0L 108  0.6  6            WYA  Walcha, NSW
(No enhancement in Swan band filter.)
2019  9  5.70   M 14.0 AQ  40.0L 108  0.8  5/           WYA  Walcha, NSW
(Centre opaque, stellar pseudo-nucleus visible in good seeing.)
2019  9  3.69   M 13.8 AQ  40.0L 108  1.3  5/           WYA  Walcha, NSW
(Does not enhance in Swan Band filter. Diffuse coma, opaque centre, sometimes stellar pseudo-nucleus visible in periods of good seeing.)
2019  8 28.70   M 14.0 AQ  40.0L 108  1.3  5/           WYA  Walcha, NSW
(Opaque centre, sometimes stellar pseudo-nucleus visible, fading to edges. Does not enhance in Swan Band filter.)
2019  8  8.70   M 14.4 AQ  40.0L 108  1.1  6            WYA  Walcha, NSW
(Faint stellar pseudo-nucleus. Coma diffuse with opaque centre.)
2019  8  3.69   M 14.2 AQ  40.0L 108  1.4  6            WYA  Walcha, NSW
(Faint stellar pseudo-nucleus. Hazy outer coma, does not enhance in Swan Band filter.)
2019  5  8.74   S 14.4 AQ  25.0L  83  0.6  2/           WYA  Walcha, NSW
(Very small, diffuse, slight brightening to centre.)