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* * * * * C/2001 A2 (LINEAR) * * * * *
lightcurve Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2001 9 14.853 S 12.5:AC 31.0J 89 & 2 0/ BOU Sint Annen (Comet just a very faint diffuse glow.) 2001 9 14.44 [12.5 30.0L 60 MAT Blinman, SA 2001 9 9.52 [12.0 20.0L 45 MAT Wallaroo, SA 2001 8 29.052 S 10.2:TJ 31.0J 58 3.7 2 DIJ Sint Annen 2001 8 29.051 S 10.3:TJ 31.0J 58 &3.5 1 BOU Sint Annen (Rather large diffuse object, involved with several stars, hence difficult to estimate accurately.) 2001 8 20.932 S 9.3 TJ 30.5T 56 6 2 COM Roden 2001 8 20.066 S 9.4 TJ 25.4J 47 5 2/ BOU Sint Annen 2001 8 18.95 S 8.7 TJ 7.0R 24 10 1/ GRA Hågår Obs., Eina (Comet was an object of low surface brightness, clearly inferiour to that of M33 and NGC 205, also slightly weaker than the eastern part of the Veil Nebula [NGC 6992]. Observed in a very good [Bortle class 3] sky.) 2001 8 18.021 S 9.0 TJ 30.5T 56 7 2 COM Roden 2001 8 17.99 S 9.0 TJ 20.3T 62 6 1/ GRA Fjellhamar 2001 8 17.99 S 8.9 TJ 7.0R 24 7 1 GRA Fjellhamar (Comet very faint in 7.0R, but easier in 20.3T, in a moderately dark [Bortle class 5] sky.) 2001 8 17.940 S 8.9 TJ 31.0J 46 6 3 DIJ Sint Annen 2001 8 17.936 S 9.1 TJ 31.0J 46 5.5 3 BOU Sint Annen 2001 8 16.954 S 8.9 TJ 31.0J 58 7 2/ DIJ Sint Annen 2001 8 16.952 S 9.0 TJ 31.0J 58 5.5 3/ BOU Sint Annen 2001 8 16.945 S 8.8 TJ 30.5T 56 8 2 COM Roden 2001 8 14.944 S 8.6 TJ 30.5T 56 8 2/ COM Roden (Coma clearly elliptical in N/S direction. Diameter is measured N/S.) 2001 8 14.906 M 8.8 TJ 15.6L 24 5.5 2/ DIJ Sint Annen 2001 8 14.901 S 8.7 TJ 15.6L 24 6 2/ BOU Sint Annen 2001 8 14.42 S 9.0 AA 10.0B 25 SEA Cowra, NSW 2001 8 12.61 S 9.3 TJ 20.0L 45 4 3 MAT Wallaroo, SA 2001 8 10.897 S 8.3 TJ 8.0B 15 7.5 2 BOU Zuidwolde 2001 8 10.892 S 8.5 TJ 30.5T 56 9 3 COM Roden 2001 8 10.50 S 8.8 AA 10.0B 25 3 3 SEA The Entrance, NSW (Appeared somewhat enhanced using Swan Band Filter.) 2001 8 8.52 S 8.9 TJ 20.0L 45 4 3 MAT Wallaroo, SA (Good transparency, moonlight 84%.) 2001 8 8.42 S 8.7 AA 10.0B 25 SEA The Entrance, NSW 2001 8 7.95 S 8.1 TJ 20.3T 62 7.5 2 GRA Fjellhamar (Diffuse and ill-defined coma; comet only barely seen w/7.0-cm R at 24x. Observering conditions were moderate [Milky Way visible, naked eye limit about 5.5, Bortle class 5-6], mainly due to a gibbous Moon and astronomical twilight [both on August 6 and 7].) 2001 8 6.97 S 7.6 TJ 7.0R 15 9.5 1 GRA Fjellhamar (Visibility clearly inferiour to open cluster NGC 7789.) 2001 8 2.072 M 7.4 TJ 15.6L 24 9 4 BOU Groningen 2001 8 2.00 S 7.2 HV 7.0R 15 12 3 GRA Fjellhamar (A 12-day old Moon close to horizon did not interfere significantly.) 2001 7 31.98 S 7.1 TJ 5.0B 7 12 2 GRA Fjellhamar (Appearance similar to cluster NGC 7789 in Cas; nautical-astronomical twilight [Sun 12 deg. under horizon].) 2001 7 31.97 S 7.1 TJ 7.0R 15 13 3 GRA Fjellhamar 2001 7 31.15 S 7.5 TJ 3.4B 9 & 9 4 PER Cabo da Roca 2001 7 30.98 S 7.0 TJ 7.0R 15 13 3 GRA Fjellhamar (Visibility improved due to a darker sky [Sun 11 1/2 deg. below horizon]; also seen in 7x50B.) 2001 7 30.15 S 7.0 TJ 3.4B 9 &10 4 PER Cabo da Roca 2001 7 28.922 S 7.2 TJ 5.0B 7 15 3 DIJ Groningen 2001 7 26.98 S 6.9 TJ 7.0R 24 9 4 GRA Fjellhamar (Comet appeared diffuse and ill-defined; w/7x50B: m1=6.9, dia.=10'. July 15-26: observations affected by nautical twilight [solar altitudes -8 to -10 1/2 degrees].) 2001 7 26.968 M 6.7 TJ 5.0B 7 12 3/ BOU Thesinge 2001 7 25.977 S 6.6 TJ 5.0B 7 12 4 BOU Noordwolde 2001 7 25.970 S 6.7 TJ 5.0B 7 10 3 DIJ Groningen 2001 7 24.966 S 6.7 TJ 5.0B 10 & 9 4/ COM Roden 2001 7 24.939 S 6.7 TJ 5.0B 7 10 4 DIJ Sint Annen (In 25.4J at 47x 57' tail visible in p.a. 206 deg.) 2001 7 24.935 M 6.6 TJ 5.0B 7 12 4 BOU Sint Annen (In 25.4J at 47x 1.0 deg. (gas)tail visible in p.a. 207 deg.) 2001 7 23.60 B 6.7 TT 5.0B 7 8 5 MAT Wallaroo, SA 2001 7 23.49 M 6.5 AA 5.0B 10 SEA Cowra, NSW 2001 7 22.974 S 6.5 TJ 5.0B 7 11 4 DIJ Groningen 2001 7 22.932 S 6.4 TJ 5.0B 7 12 3/ BOU Sint Annen 2001 7 22.925 S 6.4 TJ 5.0B 10 10 5 COM Roden 2001 7 22.65 B 6.5 TT 5.0B 7 9 5 MAT Wallaroo, SA (Very good transparency. In 25x100B, tail length is 45' in p.a. 210 deg. with the first 15' moderately intense. ? dust.) 2001 7 21.98 S 6.6 TJ 7.0R 24 8 4 GRA Fjellhamar 2001 7 21.56 B 6.4 TT 5.0B 7 9 5 MAT Wallaroo, SA (Very good transparency. In 25x100B, tail length is 50' in p.a. 212 deg.) 2001 7 21.03 S 6.4 TJ 3.4B 9 &16 s4 0.4 215 PER Cabo da Roca (Comet followed for 2h, going through different alignments with surrounding stars; no convincing evidence of the anti-tail seen last night, thus casting some doubt as to its reality (star alignment effect?). 0.4 deg. dust tail seems narrower and more intense than previous night; the nearly stellar nucleus also seems more prominent, but still contributes little to m1. In 14x100B the dust tail is 0.5 deg. in p.a. 215 deg.) 2001 7 20.98 S 6.2 TJ 7.0R 24 10 4 GRA Fjellhamar 2001 7 20.952 S 6.3 TJ 5.0B 10 12 5 COM Roden 2001 7 20.940 M 6.2 TJ 5.0B 7 13 4 BOU Sint Annen (In 25.4J at 47x rather narrow (gas)tail visible, 1.0 deg. long in p.a. 210 deg.) 2001 7 20.93 6.6 8.0B 20 13 BAR Milan 2001 7 20.15 S 6.2 TJ 3.4B 9 &18 s3/ 0.8 55 PER Cabo da Roca (0.8 deg. narrow anti-tail near p.a. 55 deg., and 0.5 deg. parabolic dust tail centered near p.a. 210 deg.; a faint nearly-stellar nucleus is visible in 9x34B but contributes little to m1, and is superimposed on a rather flat coma profile.) 2001 7 20.042 S 6.3 TJ 5.0B 7 12 4/ DIJ Groningen 2001 7 19.56 M 6.1 AA 5.0B 10 10 4 SEA The Entrance, NSW (Using 25x100B, tail visible for 1 degree in p.a. 220 degrees.) 2001 7 19.11 I 5.7:TJ 0.0E 1 5 PER Cabo da Roca 2001 7 19.11 S 6.0 TJ 3.4B 9 &17 4 0.3 220 PER Cabo da Roca 2001 7 18.04 I 5.6 TJ 0.0E 1 5 PER Cabo da Roca 2001 7 18.04 S 5.8 TJ 3.4B 9 &18 3/ PER Cabo da Roca 2001 7 17.57 M 5.9 AA 5.0B 10 SEA The Entrance, NSW 2001 7 17.04 I 5.3 TJ 0.0E 1 &16 5/ PER Cabo da Roca 2001 7 17.04 S 5.5 TJ 3.4B 9 &16 4/ >0.8 220 PER Cabo da Roca 2001 7 16.970 S 5.1 TJ 5.0B 10 &15 6 COM Roden 2001 7 16.97 S 5.3 TT 8.0R 16 13 5 GIL Noordwijk aan Zee 2001 7 16.942 M 5.1 TJ 5.0B 7 14 5/ BOU Thesinge 2001 7 16.07 4.8 8.0B 20 15 7 BAR Milan 2001 7 15.99 S 5.8 YG 7.0R 24 8 3 GRA Fjellhamar 2001 7 15.964 S 4.8 TJ 5.0B 7 14 6 DIJ Noorddijk 2001 7 15.59 B 5.6 TT 5.0B 7 12 5 MAT Wallaroo, SA (Good transparency. Outburst has quickly subsided along with a decrease in DC. Tail length in 25x100B is >1.5 degrees with the first 1/2 degree quite bright. ? dust tail enhancement during orbit crossing.) 2001 7 15.01 I 5.1 TJ 0.0E 1 &15 5/ PER Cabo da Roca 2001 7 15.01 S 5.2 TJ 3.4B 9 &16 4 >0.5 220 PER Cabo da Roca 2001 7 14.012 S 4.9 TJ 5.0B 7 13 6 DIJ Noorddijk 2001 7 12.99 S 5.2 YG 7.0R 24 10 4 GRA Fjellhamar (Comet only faintly seen due to nautical twilight [true solar altitude -8 deg.].) 2001 7 12.941 M 4.9 TJ 5.0B 7 14 7 BOU Thesinge 2001 7 12.65 B 5.1 TT 5.0B 7 7 7 MAT Wallaroo, SA (Good transparency. Comet continues to brighten and the coma is more pronounced. Approximate m2 magnitude is 10.0.) 2001 7 12.56 B 5.3 TT 5.0B 7 8 7 MAT Wallaroo, SA (Very good transparency. Tonight the nucleus appears stellar indicating another outburst! In 25x100B, tail length is > 1 degree in p.a. 230 deg. The comet is also naked eye visible.) 2001 7 11.69 B 5.6 TT 5.0B 7 7 4/ MAT Wallaroo, SA (Good transparency, moonlight 69%.) 2001 7 7.98 5.0 8.0B 40 12 BAR Milan 2001 7 5.994 S 4.6 TJ 5.0B 7 10 6 DIJ Noorddijk 2001 7 5.63 B 5.0 TT 5.0B 7 10 5 MAT Wallaroo, SA (Good transparency. Observed during 50% partial lunar eclipse.) 2001 7 3.69 B 4.7 TT 5.0B 7 9 5 MAT Wallaroo, SA (Average transparency, moonlight 96%.) 2001 7 2.69 B 4.7 TT 5.0B 7 10 5 MAT Wallaroo, SA (Average transparency, moonlight 91%.) 2001 7 1.83 B 4.5 TT 0.0E 1 20 5 MAT Wallaroo, SA (In 25x100B, the broad faint ion tail is >1 degree in p.a. 238 deg.) 2001 6 29.69 B 4.3 TT 0.0E 1 20 5/ MAT Wallaroo, SA (In 25x100B, the fading ion tail is 2 degrees in p.a. 242 deg.) 2001 6 28.65 S 4.0 AA 0.0E 1 SEA The Entrance, NSW 2001 6 24.75 S 3.8 AA 0.0E 1 SEA The Entrance, NSW (Tail even fainter in 25x100 B.) 2001 6 24.117 M 4.0 TJ 5.0B 7 20 5/ BOU Lusaka, Zambia 2001 6 24.117 S 4.4 TJ 5.0B 7 &15 6/ COM Lusaka, Zambia 2001 6 23.77 B 4.0 TT 0.0E 1 20 5/ MAT Clare Valley, SA (Comet slightly brighter than on Jun 19th. In 25x100B, the ion tail is >2 deg.) 2001 6 22.122 S 4.5 TJ 5.0B 7 15 6/ COM Lusaka, Zambia 2001 6 22.120 M 4.3 TJ 5.0B 7 20 5/ 3.8 227 BOU Lusaka, Zambia 2001 6 20.115 M 4.3 TJ 5.0B 7 16 6 BOU Lusaka, Zambia 2001 6 19.85 B 4.2 TJ 0.0E 1 15 6 MAT Wallaroo, SA (Fading has settled down to pre-outburst conditions. In 25x100B, the ion tail is >3.5 degrees in p.a. 222 deg. and seems to be weakening in both length and intensity.) 2001 6 19.127 S 4.2 TJ 5.0B 7 &12 7 COM Lusaka, Zambia 2001 6 19.124 M 4.3 TJ 5.0B 7 14 6 BOU Lusaka, Zambia 2001 6 18.79 B 4.3 TJ 0.0E 1 15 6 MAT Wallaroo, SA (In 25x100B, the faint tail is >4.5 degrees in p.a. 219 deg. Nucleus appears intact in a 20-cmL at 160x.) 2001 6 18.76 S 4.0 AA 0.0E 1 SEA Cowra, NSW (Tail approx. 3 degrees in length, but quite faint in 25x100 B.) 2001 6 18.130 M 4.0 TJ 5.0B 7 14 6/ BOU Lusaka, Zambia 2001 6 18.128 S 3.8 TJ 5.0B 7 15 7 COM Lusaka, Zambia 2001 6 17.76 S 3.7 AA 0.0E 1 SEA The Entrance, NSW (Tail fainter in 25x100B.) 2001 6 17.75 B 4.2 TJ 0.0E 1 15 6 MAT Wallaroo, SA (Sadly, the outburst was not sustainable and the comet has faded by nearly a magnitude along with reduced intensity of both the ion tail and nuclear condensation. In 25x100B, the faint tail is >5.5 degrees in p.a. 217 deg.) 2001 6 16.136 M 3.7 TJ 5.0B 7 14 7 5.7 213 BOU Glen, Free State, RSA 2001 6 15.78 B 3.6 AA 3.0R 1 SEA The Entrance, NSW 2001 6 15.160 M 3.6 TJ 5.0B 7 15 7 6.7 210 BOU Spreeufontein, Western Cape, RSA 2001 6 14.78 B 3.2 AA 3.0R 1 SEA The Entrance, NSW (Tail more readily visible but quite narrow in 25x100B. Tail possibly seen NE.) 2001 6 14.169 S 3.9 TJ 5.0B 7 15 9 5 COM Spreeufontein, Western Cape, RSA 2001 6 14.151 M 3.6 TJ 5.0B 7 15 7 6.3 207 BOU Spreeufontein, Western Cape, RSA (Moonlight, comet definitely fainter this morning, although still a fine object.) 2001 6 13.83 B 3.4:TJ 0.0E 1 10 7 MAT Wallaroo, SA (Partly cloudy conditions, ups4 Eri used for comparison only, 53% moonlight) 2001 6 13.76 S 3.1 AA 0.0E 1 SEA The Entrance, NSW (Coma very conspicuous with naked eye, but tail not positively seen. Tail faintly visible in 2.5x25B and traced for at least 2.5 degrees in 25x100B in moonlight. Strong CC. Coma extended toward east and there was an impression (in 25x100B) that this extension continued a slightly brighter 'fan' in coma extending from central condensation. Sunward edge of coma appeared 'flattened' and there appeared to be a darker segment on the sunward side of the CC.) 2001 6 13.170 S 3.5 TJ 0.0E 1 15 8 7 COM Spreeufontein, Western Cape, RSA 2001 6 13.167 B 3.3 TJ 0.0E 1 BOU Spreeufontein, Western Cape, RSA (Despite moonlight the view of the comet is stunningly different from that 48 hours ago. In 7x50B the tail is quite bright and can be followed over 7.2 degrees in p.a. 204 deg. The strongly condensed coma (DC 7/) is around 12' in diameter) 2001 6 12.82 !B 3.3 TJ 0.0E 1 12 7 MAT Wallaroo, SA (Out-out method using old pair of glasses, transparency good despite 62% moonlight, magnitude corrected for atmospheric extinction. Nucleus still appears intact through 20-cmL at 160x, tail length in 7x50B >2.5 deg in p.a. 209 deg.) 2001 6 11.167 M 4.2 TJ 5.0B 7 14 7 BOU Spreeufontein, Western Cape, RSA (Moonlight. Only hint of tail visible) 2001 6 4.34 S 4.5 AA 5.0B 10 SEA The Entrance, NSW (Low altitude in very light sky.) 2001 6 4.145 S 4.9 TJ 5.0B 7 10 7 COM Margate, Kwazulu Natal, RSA 2001 6 4.143 M 4.4 TJ 5.0B 7 12 7 2.6 198 BOU Margate, KwaZulu Natal, RSA (Comet also seen NE, despite low altitude of only 9 deg. over the Indian Ocean.) 2001 6 3.83 !B 4.3 TJ 5.0B 7 11 7 MAT Wallaroo, SA (Transparency good, altitude 7 deg, magnitude corrected for extinction. In 25x100B, a distinct eastward elongation of the coma is present.) 2001 6 3.38 B 4.6 TJ 5.0B 7 8 6/ MAT Wallaroo, SA (Transparency fair, altitude 12 deg, moonlight 92%) 2001 6 2.34 M 4.4 AA 5.0B 10 SEA The Entrance, NSW (Bright moonlight and low altitude. Comet was visible using 2.5x25B but not NE.) 2001 5 30.35 S 4.4 AA 0.0E 1 SEA The Entrance, NSW (Comet seen relatively easily with NE despite moonlight and light pollution from Sydney. Stars of mag. 5 invisible NE and one of 4.7 only faintly seen, becoming invisible when placed out of focus to match comet. Using 25x100B, about one degree of tail visible in light sky, the southern edge appearing more intense and having the appearance of a bright ray.) 2001 5 29.36 S 4.5 AA 6.5B 20 SEA The Entrance, NSW (Conditions very poor. A quick observation between rain clouds, but comet still strongly suspected NE.) 2001 5 21.40 B 5.1 TJ 5.0B 7 7 6/ >3 143 MAT Wallaroo, SA (Transparency excellent. Through 25x100B, the ion tail length is 5.3 degrees with the first 3 degrees being fairly obvious and the remainder very tenuous with the last half degree slightly more observable.) 2001 5 21.35 S 4.7 AA 0.0E 1 SEA The Entrance, NSW (Conditions relatively poor. A star of mag. 4.9 at similar elevation to comet was just visible NE when in focus and others of 4.7 were visible with difficulty out of focus [without glasses]. Comet was visible with some difficulty in focus.) 2001 5 20.40 B 5.1 TJ 5.0B 7 7 6/ >2 142 MAT Wallaroo, SA (Transparency excellent. In 25x100B, tail length is >3.3 degrees and a spectacular sight. Observation of the nucleus through a 12" telescope at 200x magnification does not appear to display the fragments.) 2001 5 17.42 B 5.2 TJ 5.0B 7 7 7 1 140 MAT Wallaroo, SA (Transparency excellent. In 25x100B tail length is >1.6 degrees. A 3 year wait for a naked eye comet since C/1998 J1 (SOHO).) 2001 5 17.35 S 4.9 AA 0.0E 1 1 135 SEA, Cowra, NSW (In 25x100B, tail extends about 4.3 degrees in p.a. 135 degrees. More intense than previous night and more concentrated toward centre again. Similar to appearance on 14th. Spectacular sight in the binoculars.) 2001 5 16.36 S 5.0 AA 0.0E 1 SEA, Cowra, NSW (In 25x100B, tail appeared broader and less intense than on previous two evenings and less concentrated toward centre. Could be traced for about 4 degrees in p.a. 130 degrees.) 2001 5 15.41 B 5.5 TJ 5.0B 7 7 6 MAT Wallaroo, SA (Transparency very good. Brightening has once again settled. In a 20-cmL, the ion tail is more prominent and extends >1.2 deg. in p.a. 135 deg.) 2001 5 15.36 S 4.9 AA 0.0E 1 SEA, Cowra, NSW (In 25x100B, tail at least 2 degrees, bright near coma but with fainter portion approx. 1 degree from coma. A diffuse 'cloud' was visible, detached from tail, at 1.5 degrees, approx., from coma [this was visible previous evening, but then seemed more continuous with tail]. This was apparently a Disconnection Event. P.a. of tail 128 degrees.) 2001 5 14.36 S 4.8 AA 0.0E 1 SEA, Cowra, NSW (In 25x100B, comet was a glorious sight with narrow ion tail, intense for about 1 degree, traced for approx. 4 degrees in p.a. 133 degrees, emerging from central region of coma. In 25.5L at 71x and 114x, cc seemed elongated approx. perpendicular to tail p.a., but did not appear double. Tail may have been glimpsed NE for about 1 degree, but presence of Gamma Lep made it difficult to be sure.) 2001 5 13.38 S 5.0 AA 2.8B 4 SEA The Entrance, NSW (In hazy sky, comet was visible NE, though only with certainty using averted vision, while a star of 4.7 mag. at same altitude was visible with some difficulty and one of 5.0 mag at greater altitude was barely visible NE. In 25x100B, coma diameter appeared about 5' with DC of 5 and tail of 1.5 deg. in p.a. 130 deg.) 2001 5 11.40 B 5.4 TJ 5.0B 7 5 6/ MAT Adelaide, SA (Transparency fair - light pollution. It seemed a rather ominous sign when my observation on May 10.40 UT gave m1=6.1 which indicated a slowed rate of brightening, however this comet continues to surprise and has undergone another significant 0.7 mag brightening in the past 24hrs. One wonders whether she will survive perihelion. Let's hope it goes out in a blaze of glory!) 2001 5 11.36 I 5.3 AA 0.0E 1 SEA The Entrance, NSW 2001 5 11.35 M 5.2 AA 2.8B 4 SEA The Entrance, NSW (Comet was faintly but easily seen with naked eye where stars of mag. 5.9 and 5.7 were invisible and one of 5.5 could only be seen with difficulty. Stars of mag. 4.7 and 5.0 appeared relatively faint NE, but were more readily seen than comet [though only marginally better for 5.0 star]. With 25x100B, comet was a very impressive object with straight and narrow ion tail of relatively high intensity, especially close to coma, extending 50' in p.a. ~125 deg.) 2001 5 10.40 B 6.1 TJ 5.0B 7 5 6 MAT Wallaroo, SA (Transparency good. The comets rate of brightening has slowed. Visible to the naked eye with averted vision. In a 20-cmL, a faint ion tail >45' in p.a. 123 deg. is visible.) 2001 5 9.44 B 6.1 TJ 5.0B 7 3 6 MAT Wallaroo, SA (Transparency fair, moonlight 96%) 2001 5 7.44 B 6.0 TJ 5.0B 7 3 6 MAT Wallaroo, SA (Transparency fair, moonlight 100%) 2001 5 6.40 B 6.0 TJ 5.0B 7 3.0 6 MAT Wallaroo, SA (Transparency average, moonlight 98%. In a 20-cmL, tail >30' in p.a. 120 deg, coma is slightly extended towards p.a. 15 deg. ?secondary component. Primary component appears intact at 160x magnification.) 2001 5 4.38 B 6.1 TJ 5.0B 7 3.0 6 MAT Wallaroo, SA (Transparency average, moonlight 87%. Comet has faded since last observation on May 01.46. ?bad sign.) 2001 5 4.38 M 5.6 AA 5.0B 10 SEA The Entrance, NSW 2001 5 1.46 B 5.9 TJ 5.0B 7 5.0 6/ MAT Wallaroo, SA (Transparency good, moonlight 58%.) 2001 4 30.46 B 6.0 TJ 5.0B 7 5.0 6 MAT Wallaroo, SA (Transparency good, moonlight 47%. Central condensation is stronger tonight.) 2001 4 29.43 B 6.2 TJ 5.0B 7 5.0 5 MAT Wallaroo, SA (Transparency good, moonlight 35%) 2001 4 28.44 B 6.3 TJ 5.0B 7 5.0 5 MAT Wallaroo, SA (Transparency average, moonlight 25%) 2001 4 27.44 B 6.4 TJ 5.0B 7 5.5 5 MAT Wallaroo, SA 2001 4 27.37 M 6.1 AA 5.0B 10 SEA Cowra, NSW 2001 4 26.43 B 6.5 TJ 5.0B 7 5.5 5 MAT Wallaroo, SA (In a 20-cmL, a faint ion tail is visible for >30' in p.a. 111 deg.) 2001 4 26.37 S 6.1 AA 2.5B 2 SEA Cowra, NSW (In 25.4L at 71x, D = 6' with a small but pronounced CC. Ion tail 20' in p.a. 110 degrees, emerging from central region of coma and curving slightly toward south. Faint but clearly defined. Comet was little changed when viewed through Swan Band filter. On both 26th. and 27th., comet MAY have been glimpsed naked eye, but the presence of eta Lep made confirmation impossible. Stars of mag. 6.2 were marginally glimpsed NE near comet.) 2001 4 25.46 B 6.6 TJ 5.0B 7 5.0 5 MAT Wallaroo, SA (Recent brightening has settled) 2001 4 24.42 B 6.5 TJ 5.0B 7 5.0 5/ MAT Wallaroo, SA (Significant brightening in the past 48 hrs. In a 20-cmL, an ion tail is traceable for >30' in p.a. 110 deg.) 2001 4 23.43 S 6.7 AA 2.5B 2 SEA Cowra, NSW 2001 4 22.44 B 7.2 TJ 5.0B 7 4.5 5 MAT Wallaroo, SA 2001 4 21.46 B 7.4 TJ 5.0B 7 4.5 5 MAT Wallaroo, SA 2001 4 20.44 B 7.5 TJ 5.0B 7 4.5 5 MAT Wallaroo, SA 2001 4 19.44 B 7.6 TJ 5.0B 7 4.5 5 MAT Wallaroo, SA 2001 4 19.38 S 7.0 AA 5.0B 10 SEA The Entrance, NSW 2001 4 18.43 B 7.6 TJ 5.0B 7 4.5 5 MAT Wallaroo, SA 2001 4 18.37 S 7.0 AA 2.5B 2 SEA The Entrance, NSW 2001 4 17.43 M 7.8 TJ 10.0B 25 4.0 5 MAT Wallaroo, SA 2001 4 17.36 S 7.2 AA 5.0B 10 SEA The Entrance, NSW 2001 4 16.49 M 7.9 TJ 10.0B 25 3.5 4/ MAT Wallaroo, SA 2001 4 16.38 S 7.3 AA 5.0B 10 SEA The Entrance, NSW 2001 4 15.50 M 8.2 TJ 10.0B 25 2.5 4/ MAT Adelaide, SA 2001 4 15.37 S 7.3 AA 5.0B 10 SEA The Entrance, NSW 2001 4 14.47 M 8.2 TJ 10.0B 25 2.5 4/ MAT Adelaide, SA 2001 4 14.38 S 7.4 AA 5.0B 10 SEA The Entrance, NSW (In 25x100B, coma diameter appeared about 4' with a DC of 6 and a faint tail to possibly 8' in p.a. 65 deg. Comet was possibly glimpsed in 2.5x25 opera glass.) 2001 4 13.835 S 8.6 TJ 25.4J 58 3 3 DIJ Bedum 2001 4 13.831 S 8.3 TJ 25.4J 58 3.2 3/ BOU Bedum (comet easily visible, despite twilight and altitude of only 9 deg.) 2001 4 13.50 M 8.2 TJ 10.0B 25 3.0 4/ MAT Wallaroo, SA 2001 4 13.39 S 7.7 AA 5.0B 10 SEA The Entrance, NSW (Comet appears more highly condensed in 25x100B than it was in earlier observations.) 2001 4 12.831 S 8.2 TJ 25.4J 58 3.2 3/ BOU Bedum (Very transparent sky; altitude only 10 deg.) 2001 4 12.44 M 8.3 TJ 10.0B 25 3.0 4/ MAT Wallaroo, SA 2001 4 11.831 S 8.2 TJ 25.4J 58 3.0 3/ BOU Bedum (Comet in twilight at low altitude of only 11 deg, but easily visible.) 2001 4 11.44 M 8.3 TJ 10.0B 25 3.0 4/ MAT Wallaroo, SA (On April 10th at 10:23 UT, a very close approach to HIP 28321 at mag 6.1. Star observed for possible occultation from 10:18 - 10:28 UT. No obvious dimming occured during this period. The comet appeared to pass east of the star.) 2001 4 11.37 M 8.3 AA 10.0B 25 SEA The Entrance, NSW 2001 4 9.44 M 8.4 TJ 10.0B 25 3.0 4 MAT Wallaroo, SA (Moonlight 97%, transparency good.) 2001 4 8.835 S 8.4 TJ 25.4J 58 2.8 3 BOU Bedum (Comet easily visible, despite full moon and low altitude of 12.5 deg.) 2001 4 7.831 S 8.3 TJ 25.4J 58 2.7 3 BOU Bedum (Comet fairly easily visible, despite full moon and low altitude of 14 deg.) 2001 4 5.44 8.3 10.0B 25 3.0 4 MAT Wallaroo, SA (Moonlight 90%, transparency fair) 2001 4 4.46 8.3 10.0B 25 3.0 4 MAT Wallaroo, SA (Moonlight 82%, transparency fair) 2001 4 3.821 S 8.0 TJ 25.4J 47 3 3/ DIJ Bedum 2001 4 3.820 S 8.2 TJ 25.4J 47 3.0 3 BOU Bedum (Strong moonlight; comet well visible despite rather low altitude of 19 deg.) 2001 4 3.812 S 7.5:TJ 30.5T 54 & 4 3/ COM Roden (Quality of estimate poor: moonlight, comet low in the sky, twilight. Comparison-star 76 yellow.) 2001 4 3.44 8.4 10.0B 25 3.0 4 MAT Wallaroo, SA (Moonlight 72%, transparency fair, I suspect moonlight is contributing to the fainter estimate rather than true comet fading.) 2001 4 3.42 S 8.0 AA 10.0B 25 SEA The Entrance, NSW 2001 4 2.822 S 7.8 TJ 15.6L 36 2.5 3 DIJ Bedum 2001 4 2.819 S 8.0 TJ 15.6L 36 3.5 2/ BOU Bedum (Moonlight interference; comet close to star of magnitude 7.1) 2001 4 2.42 8.0 10.0B 25 4.0 3/ MAT Wallaroo, SA (Moonlight 61%, transparency fair.) 2001 4 1.85 S 8.2 TJ 7.0R 24 3.5 3 GRA Hågår Obs., Eina (This comet was in outburst. It was faint but seen at correct location. Observation affected by low altitude, astronomical twilight and first quarter Moon.) 2001 4 1.52 7.9 10.0B 25 4.0 3/ MAT Wallaroo, SA (Moonlight interference, DC has slightly decreased since outburst on Mar 30.52) 2001 4 1.39 S 7.2 AA 5.0B 10 SEA The Entrance, NSW (Moonlight influencing observation.) 2001 3 31.42 S 6.9 AA 5.0B 10 SEA The Entrance, NSW (A little enhanced [similar to earlier obs.] in Swan band filter and 25x100B. Poss. glimpsed in 2.5x25 opera glass, when a star of m = 6.7 just visible.) 2001 3 30.52 M 8.0 TJ 10.0B 25 3.0 4/ MAT McLaren Vale, SA (Conditions average, comet has undergone a significant outburst, over 2.5 magnitudes in a 24hr period along with an increase in DC.) 2001 3 29.46 S 10.8 TJ 20.0L 45 3.0 2/ MAT Wallaroo, SA 2001 3 29.42 S 9.9 GA 10.0B 25 SEA Cowra, NSW 2001 3 28.44 S 10.7 TJ 20.0L 45 3.5 2/ MAT Wallaroo, SA (Excellent conditions, comet rather large and diffuse. Also plainly visible in 25x100mm binoculars.) 2001 3 28.42 S 9.9 GA 10.0B 25 SEA Cowra, NSW (Possibly a little more centrally condensed in 25.4L (71x) than earlier observation.) 2001 3 27.42 S 10.1 GA 10.0B 25 SEA Cowra, NSW 2001 3 26.824 S 10.8 TJ 25.4J 58 2.5 2/ BOU Sint Annen 2001 3 26.46 S 10.7 TJ 20.0L 45 3.0 3 MAT Wallaroo, SA (Good conditions, comet has finally "switched on", expect it to reach 6th? magnitude in June.) 2001 3 26.42 S 10.2 GA 10.0B 25 10 1 SEA Cowra, NSW (Enhanced a little through Swan Band filter. No central condensation visible in 25.4L at 71x. Comet visible in 15x80 binoculars.) 2001 3 14.43 S 13.1 GA 25.4L 71 3 2 SEA Cowra, NSW (Motion observed during the course of one hour. A slight 'mist' was suspected near ephemeris position on the two previous nights, but the proximity of a bright star on each occasion made this uncertain.) 2001 3 12.812 S 13.1 AC 31.0J 109 1.2 3/ BOU Sint Annen