* * * * * C/2016 M1 (PANSTARRS) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2019 8 8.78 S 14.8 AQ 40.0L 261 0.4 2 WYA Walcha, NSW (Difficult, diffuse coma.) 2019 8 3.76 S 15.0 AQ 40.0L 261 0.4 3 WYA Walcha, NSW (Small and difficult.) 2019 5 30.36 S 13.4 AQ 25.0L 83 1.3 2 WYA Walcha, NSW (Very diffused.) 2019 5 6.41 S 12.9 AQ 25.0L 83 1.5 2/ WYA Walcha, NSW (Very diffuse and difficult.) 2019 4 28.39 S 12.7 AQ 25.0L 83 1.3 3 WYA Walcha, NSW (Coma diffuse, slight brightening to centre.) 2019 4 7.41 S 12.8 AQ 25.0L 83 1.7 3 WYA Walcha, NSW (Coma diffuse, slight brightening to centre. Close to stars.) 2019 3 4.40 S 11.2 AQ 25.0L 39 4.5 3 WYA Walcha, NSW (Coma diffuse. Slight interference from background star in coma.) 2019 2 11.68 M 11.5 AQ 25.0L 39 2.5 4 WYA Walcha, NSW (Low altitude 17.8°. Moderately condensed centre, opaque inner coma.) 2019 2 9.67 M 11.7 AQ 25.0L 39 2.6 3 WYA Walcha, NSW (Faint star in coma. Coma very diffuse and weakly condensed. Low altitude 18.7°.) 2019 2 4.45 M 11.1 AQ 25.0L 40 4.7 5 WYA Walcha, NSW (Close to star. Diffuse inner coma, faint stellar central condensation in good seeing. First comet with new 31mm Nagler Type V eyepiece.) 2019 2 3.43 M 10.8 AQ 25.0L 39 4.2 3/ WYA Walcha, NSW (Coma diffuse, opaque centre, moderately condensed.) 2019 1 14.68 M 10.9 AQ 25.0L 39 4 5 WYA Walcha, NSW (Diffuse, opaque centre, well condensed. Background star in coma.) 2019 1 12.58 M 10.3 AQ 25.0L 39 4.3 5/ WYA Walcha, NSW (Bright star on coma edge, faint 12th mag star in coma. Coma diffuse, opaque and well condensed centre. Enhances in Swan Band filter.) 2018 12 29.45 M 10.6 AQ 25.0L 39 4.0 4/ WYA Walcha, NSW (Small opaque centre, fading to edges.) 2018 12 28.45 M 10.4 AQ 25.0L 39 3.8 4 WYA Walcha, NSW (Close to star. Moderately condensed opaque centre, transparent outer coma.) 2018 12 27.46 S 10.8 AQ 25.0L 39 3.5 3 WYA Walcha, NSW (Slight interference from faint background stars. Dims slightly in Swan band filter.) 2018 12 7.43 M 10.6 AQ 25.0L 39 3.7 4 WYA Walcha, NSW (Close to stars.) 2018 12 6.44 M 10.6 AQ 25.0L 39 4.5 3/ WYA Walcha, NSW (Coma diffuse, faint edges gradually brighten to an opaque centre. Coma centre dims in Swan Band filter.) 2018 11 29.47 M 10.5 AQ 25.0L 39 3.4 5/ WYA Walcha, NSW (Coma diffuse, opaque centre with faint stellaring visible in good seeing. Low altitude 18.8°.) 2018 11 26.44 M 10.8 AQ 25.0L 39 3 6 WYA Walcha, NSW (Faint stellar pseudo-nucleus. Diffuse semi-transparent inner coma fades to transparent outer coma. Low altitude 19.2°.) 2018 11 11.69 M 10.7 AQ 25.0L 39 3.2 4 WYA Walcha, NSW (Coma diffuse, inner coma moderately condensed. Dims slightly in Swan Band. Low altitude 16.9°.) 2018 11 10.65 S 10.6 AQ 25.0L 39 2.5 4/ WYA Walcha, NSW (Coma diffuse, central condensation moderately condensed. Semi-transparent outer coma. Dims slightly in Swan Band filter.) 2018 11 8.46 S 10.5 AQ 25.0L 39 3.2 3 WYA Walcha, NSW (Close to star. Outer coma tenuous with an opaque but weakly condensed centre. Low altitude 14.8°.) 2018 11 3.39 M 10.4 AQ 25.0L 39 1.7 3/ WYA Walcha, NSW (Close to faint stars. Moderately condensed and opaque centre surrounded by semi-transparent haze. Slight twilight interference.) 2018 10 30.40 S 10.3 AQ 25.0L 39 3.8 3 WYA Walcha, NSW (Star in coma, coma centre opaque.) 2018 10 29.43 M 10.4 AQ 25.0L 39 3.8 4 WYA Walcha, NSW (Low altitude 17.7°. Small opaque centre, moderately condensed, diffuse outer coma.) 2018 10 27.39 S 10.5 AQ 25.0L 39 2.8 3 WYA Walcha, NSW (Coma enhances slightly in Swan Band filter. Diffuse coma, opaque centre but weakly condensed.) 2018 10 19.40 M 11.1 AQ 25.0L 83 1.7 6 WYA Walcha, NSW (Moonlight. Very diffuse outer coma, small and well condensed opaque inner coma, stellar central condensation.) 2018 10 12.94 S 10.3 TK 22.0L 160 2.5 4 GOI Araçatuba 2018 10 8.41 M 10.2 AQ 25.0L 83 2.3 4/ WYA Walcha, NSW (Coma diffuse, enhances in Swan Band filter. Moderately condensed centre. Busy star field, visible at 39x but best with 83x. Poor seeing.) 2018 10 4.43 M 10.4 TK 40.6L 76 2 4 CAM Katherine, NT 2018 10 1.40 M 10.2 AQ 25.0L 39 2.8 4 WYA Walcha, NSW (Outer coma diffuse, semi-transparent. Moderately condensed opaque inner coma.) 2018 9 30.44 M 10.5 AQ 40.6L 76 2 4 CAM Katherine, NT 2018 9 29.43 M 10.5 AQ 40.6L 76 2 4 CAM Katherine, NT 2018 9 28.43 M 10.4 AQ 40.6L 76 1.5 5 CAM Katherine, NT 2018 9 27.43 M 10.4 AQ 40.6L 76 1.5 5 CAM Katherine, NT 2018 9 27.38 M 10.5 AQ 25.0L 83 2.5 4 WYA Walcha, NSW (Coma centre moderately condensed and opaque, fading to edges. Enhances in Swan Band filter.) 2018 9 13.43 M 10.4 AQ 40.6L 76 3 5 CAM Katherine, NT 2018 9 10.38 M 9.8 TK 25.0L 39 3.5 5/ WYA Walcha, NSW (Sky slightly hazy with dust/smoke in upper atmosphere.) 2018 9 9.94 S 10.1 TK 22.0L 60 3 4 GOI Araçatuba 2018 9 9.40 M 9.6 TK 25.0L 39 4.9 4/ WYA Walcha, NSW (Coma enhances in Swan Band filter. Faint outer coma, gradually brightens to a well condensed centre.) 2018 9 8.38 M 9.7 TK 25.0L 39 4.8 5/ WYA Walcha, NSW (Diffuse outer coma, opaque centre, sometimes stellar.) 2018 9 7.40 M 9.8 TK 25.0L 39 3.2 5/ WYA Walcha, NSW (Close to star pairing on edge of coma. Coma enhances in Swan Band filter.) 2018 9 6.46 M 10.1 AQ 40.6L 76 3 6 CAM Katherine, NT 2018 9 5.52 S 9.7 AA 10.0B 25 3 SEA Cowra, NSW 2018 9 3.46 M 9.9 TK 40.6L 76 2.5 6/ CAM Katherine, NT 2018 9 1.45 M 9.8 TK 40.6L 76 2 6 CAM Katherine, NT 2018 8 31.45 M 9.8 TK 40.6L 76 2.5 6 CAM Katherine, NT 2018 8 29.37 M 9.8 TK 25.0L 39 2.9 5/ WYA Walcha, NSW (Faint stars on NE edge of coma. Enhances well in Swan Band filter.) 2018 8 15.06 S 9.0 TK 10.0B 20 4 4 GOI Araçatuba 2018 8 14.47 M 9.1 TK 25.0L 39 6 5/ WYA Walcha, NSW (Transparent outer coma, brightening to a well condensed opaque centre, pale-aqua blue in colour. Faintly stellar in periods of good seeing.) 2018 8 13.45 M 9.0 TK 8.0R 36 5 5 CAM Katherine, NT 2018 8 13.37 M 9.1 TK 25.0L 39 3.8 5 WYA Walcha, NSW (Star on the Western edge of coma. Faint, short tail to the East approximately.) 2018 8 11.45 M 9.0 TK 8.0R 36 5 5 CAM Katherine, NT 2018 8 10.47 M 8.9 TK 8.0R 36 5 5 CAM Katherine, NT 2018 8 10.08 S 9.0 TK 22.0L 60 4 5 GOI Araçatuba 2018 8 10.07 S 8.9 TK 10.0B 20 4 4/ GOI Araçatuba 2018 8 9.43 M 8.9 TK 8.0R 36 6 5 CAM Katherine, NT 2018 8 8.38 M 8.7 TK 25.0L 39 5.4 5 WYA Walcha, NSW (Faint stars in coma, well condensed centre.) 2018 8 7.45 M 9.1 TK 8.0R 36 5 5 CAM Katherine, NT 2018 8 6.58 M 8.8 TK 25.0L 39 6 5 5m 98 WYA Walcha, NSW (Short, faint broad tail visible. Large transparent outer coma gradually brightening to a well condensed centre. Enhances in Swan Band filter.) 2018 8 6.44 M 9.0 TK 8.0B 20 5 5 CAM Katherine, NT 2018 8 4.42 M 9.0 TK 8.0B 20 6 5 CAM Katherine, NT 2018 8 2.36 M 8.9 TK 25.0L 39 6.9 6 WYA Walcha, NSW (Faintly stellar, opaque inner coma, transparent outer coma.) 2018 8 1.36 M 8.8:TK 25.0L 39 5.1 5 WYA Walcha, NSW (Magnitude uncertain due to interference by star in coma.) 2018 8 1.35 S 8.9 AA 10.0B 25 4 SEA Cowra, NSW (Marginally enhanced using Swan Band filter.) 2018 7 31.44 M 8.5 TK 8.0R 36 5 6 CAM Katherine, NT 2018 7 30.36 M 8.7 TK 25.0L 39 4.8 5/ WYA Walcha, NSW (Coma appears elongated to the East approximately. Coma centre well condensed, opaque, pale aqua-blue in colour and sometimes appears stellar in good seeing. Enhances slightly in Swan Band filter.) 2018 7 22.52 M 9.0 TK 40.6L 76 5 5 CAM Katherine, NT 2018 7 21.45 M 8.8 TK 8.0R 36 6 5 CAM Katherine, NT 2018 7 20.72 M 8.6 TK 25.0L 39 5 5/ WYA Walcha, NSW (Short, faint broad tail visible to the East approximately. Low altitude 15.2°.) 2018 7 20.17 S 8.8 TK 10.0B 20 6 4 GOI Araçatuba 2018 7 18.72 M 9.1 TK 25.0L 39 3.5 5/ 6.3m 40 WYA Walcha, NSW (Faint star in coma. Coma diffuse, semi-transparent inner coma. Faint broad tail visible. Low altitude 16.0°.) 2018 7 17.50 M 9.0 TK 8.0R 36 5 5 CAM Katherine, NT 2018 7 16.42 M 9.0 TK 25.0L 39 3.5 5 WYA Walcha, NSW (Busy star field, close to stars. Transparent outer coma, opaque inner coma. Enhances in Swan Band filter.) 2018 7 15.14 S 8.7 TK 10.0B 20 6 4/ GOI Araçatuba 2018 7 13.71 M 8.7 TK 25.0L 39 3.5 6 WYA Walcha, NSW (Coma diffuse, small faint stellar centre. Faint star in coma.) 2018 7 12.47 M 8.7 TK 25.0L 39 5.4 6 WYA Walcha, NSW (Short, broad transparent tail visible to NE approximately.) 2018 7 11.73 M 8.7 TK 25.0L 39 5.1 5/ WYA Walcha, NSW (Outer coma diffuse, opaque centre, well condensed. Appears faintly stellar in good seeing.) 2018 7 10.44 M 8.6 TK 8.0B 20 6 5 CAM Katherine, NT 2018 7 9.46 M 8.5 TK 8.0R 36 5 5 CAM Katherine, NT 2018 7 8.50 M 8.6 TK 8.0B 20 6 5 CAM Katherine, NT 2018 7 8.38 M 8.3 TK 25.0L 39 5.6 5/ 5m 40 WYA Walcha, NSW (Coma diffuse at edges, brightening gradually to opaque centre, well condensed. Faint transparent and slightly curved tail visible. Convex side to the East. 2018 7 6.51 M 8.5 TK 25.0L 39 5.3 5/ 5m 45 WYA Walcha, NSW (Faint, broad transparent tail visible. Coma diffuse with well condensed opaque centre, faintly stellar in good seeing. Coma enhances slightly in Swan Band filter.) 2018 7 6.12 S 8.4 TK 10.0B 20 6 4/ GOI Araçatuba 2018 7 4.36 M 8.5 TK 25.0L 39 4.8 5 6m 30 WYA Walcha, NSW (Faint, broad transparent tail visible. Well condensed centre, pale-aqua blue in colour. Enhances slightly in Swan Band filter. Globular cluster NGC 6352 in field.) 2018 7 4.05 S 8.5 TK 10.0B 20 6 4 GOI Araçatuba 2018 6 30.42 S 8.5 TK 8.0B 20 8 5/ CAM Katherine, NT 2018 6 24.82 S 8.5 TK 8.0B 20 8 5 CAM Katherine, NT 2018 6 23.81 S 8.5 TK 8.0B 20 8 4/ CAM Katherine, NT 2018 6 23.74 M 8.6 TK 25.0L 39 6 6 4.7m 348 WYA Walcha, NSW (Broad faint tail visible. Stellar central condensation, opaque centre. Observed from 1250m altitude. SQM reading of 21.8 taken as an average over 5 readings near zenith.) 2018 6 22.74 M 8.7 TK 25.0L 39 4.2 6 6.4m 0 WYA Walcha, NSW (Faint tail visible. Slight interference from field star. Faint stellar central condensation, opaque centre. Enhances in Swan Band filter. Pale aqua-blue in colour.) 2018 6 21.77 S 8.6 TK 8.0B 20 6 4/ CAM Katherine, NT 2018 6 20.82 S 8.8 TK 8.0B 20 5 4 CAM Katherine, NT 2018 6 19.50 S 8.7 TK 8.0B 20 6 4 CAM Katherine, NT 2018 6 19.05 S 8.6 TK 10.0B 20 6 4/ GOI Araçatuba 2018 6 19.05 S 7.7 TK 5.0B 10 10 3 GON Alto del Castro - Aralla, León (Altitude 10°. Observation made under better conditions, from a higher mountain location, providing a wider coma diameter and brighter m1 estimates in comparison with my previous June 13 observation.) 2018 6 19.04 S 7.9 TK 10.0B 25 8 3/ 0.3 350 GON Alto del Castro - Aralla, León 2018 6 19.03 S 8.3 TK 20.3T 77 6 4 0.3 350 GON Alto del Castro - Aralla, León 2018 6 18.64 S 8.7 TK 8.0B 20 5 4/ CAM Katherine, NT 2018 6 18.05 S 8.7 TK 10.0B 20 5 4/ GOI Araçatuba 2018 6 17.81 S 8.7 TK 8.0B 20 5 4 CAM Katherine, NT 2018 6 16.83 S 8.5 TK 8.0B 20 5 4 CAM Katherine, NT 2018 6 16.03 S 8.8 TK 10.0B 20 4.5 4/ GOI Araçatuba 2018 6 13.72 M 8.8 TK 25.0L 39 5.4 5 5.9m 322 WYA Walcha, NSW (Faint transparent tail visible. Well condensed centre, pale aqua-blue in colour, not quite stellar. Coma enhances in Swan Band filter. Faintly visible in 7x50 binoculars.) 2018 6 13.07 S 8.8 TK 20.3T 77 4 3/ 0.2 350 GON Pandorado, León (Altitude 14°. Dust tail.) 2018 6 13.06 S 8.3 TK 10.0B 25 6 3/ GON Pandorado, León 2018 6 12.71 M 8.8 TK 25.0L 39 6 5/ WYA Walcha, NSW (Outer coma slightly enhances and inner coma dims using Swan Band filter. Opaque well condensed centre, appears pale aqua in colour. Faint stars in coma.) 2018 6 6.07 S 9.1 TK 10.0B 20 4 4 GOI Araçatuba 2018 6 4.44 M 8.9 TK 25.0L 39 3.3 4/ WYA Walcha, NSW (Outer coma extended to the West approximately. Faint star in coma. Opaque, moderately condensed centre. At 83x the centre appears stellar.) 2018 5 25.72 M 9.6:TK 25.0L 39 2.9 5 WYA Walcha, NSW (Magnitude uncertain due to interference by mag 10.2 star near centre of coma.) 2018 5 22.72 M 9.6 TK 25.0L 39 4.2 5/ WYA Walcha, NSW (Outer coma diffuse, pale-aqua blue opaque centre. Coma enhances in Swan Band filter, inner coma dims.) 2018 5 21.72 M 10.0 TK 25.0L 39 5 5/ WYA Walcha, NSW (Close to stars, centre opaque, faintly stellar.) 2018 5 21.07 S 8.9 TK 10.0B 25 5 3/ GON Alto del Castro - Aralla, León 2018 5 21.06 S 9.1 TK 20.3T 77 5 3 GON Alto del Castro - Aralla, León 2018 5 21.035 S 9.3 TK 15.5L 42 3.1 4/ DIJ Burlage 2018 5 20.31 S 9.7 TK 22.0L 60 4 4/ GOI Araçatuba 2018 5 19.72 M 10.2 TK 25.0L 39 4.7 6 WYA Walcha, NSW (Semi-transparent outer coma, inner coma opaque with faint stellar central condensation. Outer coma enhances in Swan Band filter, inner coma disappears making the coma appear more uniform in brightness. Hint of dust tail within the coma extending to NW approximately.) 2018 5 18.73 M 10.2 AQ 25.0L 39 3.5 5 WYA Walcha, NSW (Close to nearby stars. Coma diffuse, slightly elongated to WSW approximately. Enhances in Swan Band filter.) 2018 5 16.02 S 9.0 TK 20.3T 100 4 3 GON Pandorado, León 2018 5 15.042 S 9.6 TK 15.5L 42 2.5 3/ DIJ Burlage 2018 5 10.62 M 10.0 AQ 25.0L 39 3.2 6 WYA Walcha, NSW (Outer coma enhances in Swan Band filter, inner coma dims. Coma elongated to the West approximately.) 2018 5 9.59 M 10.1 AQ 25.0L 39 4.7 6 WYA Walcha, NSW (Transparent outer coma enhances in Swan band filter while the faintly stellar and opaque central condensation dims.) 2018 5 9.17 S 10.6 TK 22.0L 60 2.5 3 GOI Araçatuba (Little enhancement with comet filter.) 2018 5 9.09 S 9.3 TK 20.3T 77 5 3 GON Pandorado, León (Before moonrise. Altitude 24°.) 2018 5 9.058 S 9.5 TK 15.5L 42 3.3 4 DIJ Burlage 2018 5 7.038 S 9.7 TA 15.5L 42 3.2 2/ DIJ Burlage 2018 5 3.76 S 10.5 AU 40.0L 144 1.7 4 YOS Kita-karuizawa, Gunma (Hard to see due to the bright moon.) 2018 4 22.27 S 10.8 AU 22.0L 160 2 4 GOI Araçatuba 2018 4 22.083 S 10.5 AQ 30.5T 73 2.5 3 BOU Burlage, Germany 2018 4 22.081 S 10.5 AQ 30.5T 73 2.0 3/ DIJ Burlage 2018 4 20.69 M 10.5 AQ 25.0L 39 3.8 5/ WYA Walcha, NSW (Coma enhances slightly in Swan Band filter. Central condensation sometimes appears stellar in periods of good seeing.) 2018 4 19.09 S 9.9 TK 20.3T 77 4 3 GON Puerto de Aralla, León 2018 4 19.079 M 11.0 AQ 30.5T 102 2.1 3/ BOU Burlage, Germany 2018 4 18.077 S 10.6 AQ 30.5T 102 1.5 4 DIJ Burlage 2018 4 16.73 M 11.2 AQ 25.0L 83 2.2 5/ WYA Walcha, NSW (Coma does not appear to enhance in Swan Band filter. Diffuse outer coma.) 2018 4 15.71 M 11.4 AQ 25.0L 83 2.7 5/ WYA Walcha, NSW (Coma does not enhance in Swan Band filter. Opaque centre, moderately condensed. Hints of stellaring in periods of good seeing. Outer coma diffused and appears fanned to the North.) 2018 4 14.67 M 11.6 AQ 25.0L 83 2 4/ WYA Walcha, NSW (Coma does not enhance in Swan Band filter. Inner coma opaque, moderately condensed, no tail.) 2018 4 11.66 M 11.3 AQ 25.0L 39 2.3 4 WYA Walcha, NSW (Outer coma diffuse. Inner coma opaque and moderately condensed. Does not appear to enhance in Swan Band filter.) 2018 3 24.70 S 12.0 AQ 25.0L 83 1.3 3 WYA Walcha, NSW (Interference from background stars. Diffuse coma with opaque centre. Does not enhance in Swan Band filter.) 2018 3 24.33 S 11.3 AU 22.0L 160 1.5 3 GOI Araçatuba 2018 3 18.72 M 11.8 AQ 25.0L 83 1.3 5/ WYA Walcha, NSW (Does not enhance in Swan Band filter. Coma diffuse with a small and opaque centre that is sometimes stellar in periods of good seeing.) 2018 2 25.183 S 12.2 AQ 30.5T 102 1.3 3 BOU Burlage, Germany 2018 2 25.180 S 12.4 AQ 30.5T 102 1.6 1 DIJ Burlage 2018 2 21.23 S 11.0 TK 20.3T 133 3 2/ GON Villacintor, León (Altitude 24°.) 2017 10 26.40 S[13.9 UV 40.0L 257 !0.4 YOS Kita-karuizawa, Gunma (Not visible.) 2017 4 23.07 V 16.4 TK 50.0L 0.3 QVA Horten