* * * C/2000 W1 (Utsunomiya-Jones) * * *

lightcurve Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2001 2 19.69 [12.5 HS 20.0L 160 MAT Wallaroo, SA 2001 1 28.77 S 12.0:HS 20.0L 160 2.0 1 MAT Wallaroo, SA (Comet very diffuse, barely surviving perihelion) 2000 12 18.46 S 6.6 TJ 10.0B 40 1.0 5/ MAT Wallaroo, SA (Twilight interference and low altitude. No correction for atmospheric extinction required) 2000 12 17.44 S 6.2 AA 10.0B 25 & 1 SEA Cowra, NSW (Deep in twilight and low altitude. Visibility somewhat enhanced using Swan Band Filter.) 2000 12 13.47 S 6.8 TJ 10.0B 25 2.5 5/ 10m 90 MAT Wallaroo, SA 2000 12 9.48 S 7.0 TJ 10.0B 25 2.0 5/ MAT Wallaroo, SA (Moonlight interference) 2000 12 8.47 S 6.9 TJ 10.0B 25 2.0 5/ MAT Wallaroo, SA (Moonlight interference) 2000 12 3.50 S 6.8 TJ 5.0B 7 3.0 4/ MAT Wallaroo, SA (Moonlight interference) 2000 12 1.48 M 7.3 AA 10.0B 25 SEA Cowra, NSW 2000 11 30.54 S 6.7 TJ 5.0B 7 4.5 4/ MAT Wallaroo, SA 2000 11 29.52 S 6.8 TJ 5.0B 7 5.0 4/ MAT Wallaroo, SA 2000 11 28.52 S 7.0 TJ 5.0B 7 5.0 4 MAT Wallaroo, SA (Through 25x100mm binoculars, the comet is slightly more condensed than on previous evenings and displays a very faint, short ion tail) 2000 11 28.45 sM 7.2 AA 10.0B 25 5 4 15m 60 SEA Cowra, NSW 2000 11 27.50 S 7.1 TJ 5.0B 7 5.0 3 MAT Wallaroo, SA 2000 11 27.44 S 7.5:AA 10.0B 25 SEA Cowra, NSW (Visibility enhanced using Swan Band Filter. Distinct, but non-stellar, central condensation visible in 25.4L at 71x.) 2000 11 26.71 S 7.3 TJ 5.0B 7 5.0 3 MAT Wallaroo, SA 2000 11 26.63 S 7.4 TJ 10.0B 25 5.0 4 MAT Wallaroo, SA (Sadly, Albert Jones beat me to the discovery by 21 hrs.)