* * * * * 66P/du Toit * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2018 8 20.13 S 11.5 TK 20.3T 77 5 1/ GON Alto del Castro, León (Faint tail difficult to separate from the coma. The bright estimate [11.5] is related to the 5' observed width of the coma and tail.) 2018 8 15.74 S 13.8 AQ 25.0L 83 1.5 3 WYA Walcha, NSW (Difficult to see, very diffuse.) 2018 8 13.82 S 13.9 AQ 40.6L 165 1.0 2 CAM Katherine, NT 2018 8 12.83 S 14.0 AQ 40.6L 165 1.0 1/ CAM Katherine, NT 2018 8 10.78 S 13.6 AQ 40.6L 165 1.0 2 CAM Katherine, NT 2018 8 9.84 S 13.6 AQ 40.6L 165 1.5 2 CAM Katherine, NT 2018 8 8.75 S 13.8 AQ 25.0L 83 1.7 1/ WYA Walcha, NSW (Difficult due to glare from nearby 6.2 mag star in field. Observed in periods of good seeing with bright star just out of field.) 2018 8 6.63 S 13.0 AQ 25.0L 83 2.6 2 WYA Walcha, NSW (Difficult, very diffuse, slight brightening to centre.) 2018 7 23.75 S 13.6 AQ 25.0L 83 1.8 2 WYA Walcha, NSW (Very diffuse, difficult.) 2018 7 22.81 S 12.8 AQ 40.6L 76 2.5 1/ CAM Katherine, NT 2018 7 22.13 S 10.0 TK 20.3T 77 4 2 GON Quintanilla de los Oteros, León (Beginning of astronomical twilight. Altitude 19°.) 2018 7 21.82 S 12.6 AQ 40.6L 76 2.0 1 CAM Katherine, NT 2018 7 20.82 S 12.5 AQ 40.6L 76 1.5 1/ CAM Katherine, NT 2018 7 18.77 S 12.0 AQ 25.0L 39 4 2 WYA Walcha, NSW (Enhances slightly in Swan Band filter. Very diffuse.) 2018 7 18.12 S 9.9 TK 20.3T 77 4 2 GON Alto del Castro, León (Beginning of astronomical twilight. Altitude 16°.) 2018 7 17.81 S 12.4 AQ 40.6L 76 2 1 CAM Katherine, NT 2018 7 16.77 S 12.8 AQ 40.6L 76 2 1/ CAM Katherine, NT 2018 7 11.76 S 12.3 AQ 25.0L 83 2.3 1 WYA Walcha, NSW (Coma diffuse, weakly condensed, close to mag 12.5 star. Faintly visible at 39x as a diffuse patch.) 2018 7 10.78 S 12.5 AQ 40.6L 76 2 2 CAM Katherine, NT 2018 7 10.12 S 9.7 TK 20.3T 77 5 2/ GON Alto del Castro, León (Beginning of astronomical twilight. Altitude 11°.) 2018 7 9.66 S 12.7 AQ 25.0L 83 2.1 2/ WYA Walcha, NSW (Very diffuse and weakly condensed. Barely visible at 39x.) 2018 7 8.80 M 11.5 AQ 40.6L 76 2 2 CAM Katherine, NT 2018 6 24.80 S 11.5 AQ 40.6L 76 3.5 1/ CAM Katherine, NT 2018 6 23.78 S 11.4 AQ 40.6L 76 3.5 1 CAM Katherine, NT 2018 6 23.75 S 11.1 AQ 25.0L 39 7 3 WYA Walcha, NSW (Enhances in Swan Band filter. Coma diffuse, weakly condensed centre.) 2018 6 22.76 S 11.1 AQ 25.0L 39 5.1 3 WYA Walcha, NSW (Enhances slightly in Swan Band filter. Very diffuse, minimal interference from nearby bright stars.) 2018 6 21.75 S 11.2 AQ 40.6L 76 4 1 CAM Katherine, NT 2018 6 19.79 S 11.2 AQ 40.6L 76 4 2 CAM Katherine, NT 2018 6 17.78 S 11.2 AQ 40.6L 165 3 2 CAM Katherine, NT 2018 6 16.33 S 11.2 AU 22.0L 160 2 2/ GOI Araçatuba 2018 6 13.77 S 10.8 AQ 25.0L 39 6.3 3 WYA Walcha, NSW (Coma very diffuse, weakly condensed opaque centre.) 2018 6 12.75 S 11.0 AQ 25.0L 39 6.3 3/ WYA Walcha, NSW (Coma large and diffuse, opaque centre but weakly condensed.) 2018 6 11.71 S 10.3 TK 25.0L 39 7.2 3 WYA Walcha, NSW (Coma large and very diffuse. No enhancement in Swan Band filter.) 2018 5 25.74 S 10.7 AQ 25.0L 39 6.5 3 WYA Walcha, NSW (Coma large and diffuse and pale aqua-blue in colour. Faint star in coma. Hint of elongation to the West approximately.) 2018 5 22.74 S 10.2 TK 25.0L 39 5.8 3 WYA Walcha, NSW (Coma enhances in Swan Band filter, diffuse with weakly condensed opaque centre. Faint star in coma.) 2018 5 21.73 S 10.6 AQ 25.0L 39 4.4 3 WYA Walcha, NSW (Interference by nearby stars. Enhances in Swan Band filter. Diffuse coma, slightly brighter in the centre but weakly condensed.) 2018 5 20.33 S 11.2 AU 22.0L 160 3 2 GOI Araçatuba 2018 5 19.75 S 10.5 TK 25.0L 39 6.6 3 WYA Walcha, NSW (Coma large, opaque centre. Semi-transparent outer coma appears slightly elongated to the NE. Enhances in Swan Band filter.) 2018 5 18.75 S 10.4 TK 25.0L 39 5.8 3/ WYA Walcha, NSW (Coma large and diffuse, slight brightening to centre. Enhances slightly in Swan Band filter.) 2018 5 10.63 S 10.6 AQ 25.0L 39 3.8 3 WYA Walcha, NSW (Coma diffuse, weakly condensed. Low altitude 19.4°.) 2018 5 9.65 S 10.5 AQ 25.0L 39 4.1 2/ WYA Walcha, NSW (Moonlight. Coma very diffuse, visible just above sky background threshold. Difficult.) 2018 4 22.29 S 12.4 AU 22.0L 160 1 2 GOI Araçatuba 2018 4 20.70 S 11.3 AQ 25.0L 39 5 2/ WYA Walcha, NSW (Close to stars, coma diffuse, slight enhancement in Swan Band filter.) 2018 4 16.74 S 11.0 AQ 25.0L 39 5 2/ WYA Walcha, NSW (Coma very diffuse. Close to stars.) 2018 4 15.73 S 11.9 AQ 25.0L 83 2.4 2/ WYA Walcha, NSW (Coma appears as a diffuse patch of light, does not enhance in Swan band filter.) 2018 4 14.68 S 12.6 AQ 25.0L 83 1.6 1/ WYA Walcha, NSW (Does not enhance in Swan Band filter, coma very diffuse. Close to faint stars. Visible at 39x as a patch of diffuse light.) 2018 4 11.67 S 12.4 AQ 25.0L 83 1.8 2/ WYA Walcha, NSW (Does not enhance in Swan Band filter. Coma very diffuse and visible despite being close to bright star. Minimal interference from moonlight, moon altitude 0.6°.)
2003 10 13.45 S[13.0 HS 28.0T 133 ! 1 MAT Wallaroo, SA (Milky way interference.) 2003 9 21.43 S 12.9 HS 28.0T 133 1 2 MAT Wallaroo, SA (Milky way interference.) 2003 9 19.45 S 12.7 GA 25.4L 71 SEA Cowra, NSW 2003 8 28.48 S 12.1 GA 25.4L 71 2 2 SEA Cowra, NSW 2003 8 26.47 S 11.7 TK 28.0T 133 2 3 MAT Wallaroo, SA (Lightcurve is virtually identical to its 1944 apparition. Expect peak brightness of 11.5 at its next return in May 2018.) 2003 8 26.44 S 12.0 GA 25.4L 71 2 SEA Cowra, NSW (Comet was very diffuse, but possibly a little enhanced through Swan Band filter.) 2003 8 15.41 S 12.0 TK 28.0T 133 2 2 MAT Wallaroo, SA (Slight enhancement with Swan band filter.) 2003 7 29.44 S 12.4 TK 28.0T 133 2 2 MAT Wallaroo, SA 2003 7 27.46 S 12.3 TK 28.0T 133 2 2 MAT Wallaroo, SA 2003 7 22.43 S 12.4 TK 28.0T 133 2 2 MAT Wallaroo, SA (HS comparisons give mag 12.9. Slight enhancement with a Swan Band filter.) 2003 7 17.44 S 13.3 HS 28.0T 133 2 2 MAT Wallaroo, SA (This may be the first visual observation of this comet since its discovery apparition in 1944. Slight enhancement with a Swan band filter.)