C/1995 O1 (Hale-Bopp)

C/1995 O1 (Hale-Bopp)
Reported observations:
2000 July 04.91 UT: m1=14.0:, Dia.=0.5', DC=2 ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia) [Very faint diffuse object]
2000 June 06.45 UT: m1=[13.5, Dia.=0.5' ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia)
2000 June 05.45 UT: m1=[13.7, Dia.=0.5' ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia) [Comet not visible. Interestingly it's position is only about 1 deg away from the Tarantula nebula and SN 1987A. Even though the comet was not visible, it was interesting to observe the field knowing that two major astronomical events of the 20th century were that close together. I suspect that I will not be able to observe C/1995O1 from my backyard until it becomes better placed to be observed in the morning sky rather than the evening sky, Alternatively I May  have to travael to a darker sky!]
2000 June 01.47 UT: m1=[13.5, Dia.=0.5' ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia) [Comet not visible among the bright sky background of the LMC]
2000 May  21.45 UT: m1=[13.5, Dia.=0.5' ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia) [Comet not visible among the bright sky background of the LMC]
2000 May  19.45 UT: m1=[13.0, Dia.=0.5' ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia) [Comet not visible among the bright sky background of the LMC]
2000 Apr. 05.54 UT: m1=13.5, Dia.=0.7', DC=2 ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Apr. 02.54 UT: m1=13.5, Dia.=0.9', DC=2 ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Mar. 17.52 UT: m1=13.4, Dia.=0.8', DC=2 ... 41-cm L (200x) ...  Andrew Pearce (Nedlands, Western Australia)
2000 Feb. 07.52 UT: m1=13.2, Dia.=1.2', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Feb. 04.58 UT: m1=13.2, Dia.=1.2', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
2000 Feb. 02.58 UT: m1=13.1, Dia.=1.2', DC=3 ... 41-cm L (90x) ... Andrew Pearce, Nedlands, Western Australia
2000 Feb. 01.58 UT: m1=13.3, Dia.=0.8', DC=3 ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Jan. 28.59 UT: m1=13.3, Dia.=0.9', DC=3/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Jan. 27.60 UT: m1=13.3, Dia.=1.1', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Jan. 26.57 UT: m1=13.3, Dia.=0.7', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Jan. 25.58 UT: m1=13.3, Dia.=0.7', DC=3/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Jan. 10.55 UT: m1=13.0, Dia.=1', DC=5 ... 20-cm L (158x) ... Michael Mattiazzo (Wallaroo, South Australia) [DC has increased due to the Earth crossing the comets orbit]
2000 Jan. 08.70 UT: m1=13.3, Dia.=0.8', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
2000 Jan. 03.52 UT: m1=13.0, Dia.=1', DC=5 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
2000 Jan. 02.63 UT: m1=13.0, Dia.=1.3', DC=3/ ... 41-cm L ... Andrew Pearce (Dowerin, Western Australia)
1999 Nov. 08.81 UT: m1=12.7, Dia.=1.4', DC=4 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia) [Comet seems to have got a little brighter over the last week or so]
1999 Nov. 07.81 UT: m1=12.8, Dia.=1.1', DC=3/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Nov. 07.44 UT: m1=13.0, Dia.=1', DC=2 ... 20.3-cm L (56x) ... Paul Camilleri (Cobram, Victoria, Australia)
1999 Nov. 06.78 UT: m1=12.9, Dia.=1.0', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Nov. 03.81 UT: m1=13.0, Dia.=1.1', DC=3/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Nov. 02.81 UT: m1=12.9, Dia.=1.0', DC=3/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Nov. 01.80 UT: m1=12.9, Dia.=1.0', DC=4 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Oct. 28.54 UT: m1=13.0:, Dia.=1.0', DC=3 ... 20-cm L (158x) ... Michael Mattiazzo (Wallaroo, South Australia)[outburst appears to have dissipated]
1999 Oct. 22.84 UT: m1=12.8, Dia.=0.7', DC=6/ ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia) [Central condensation still prominent, however it appears to have decreased somewhat in intensity. Moon still visible low in the western sky, therefore the sky background is some what brighter than on previous mornings which has affected the amount of outer coma that can be seen. In periods of good seeing, a stellar condensation can be made out clearly in the central coma.]
1999 Oct. 21.84 UT: m1=12.6, Dia.=0.8', DC=7/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia) [Nuclear outburst confirmed. A definite stellar central condensation of approx 14th mag is clearly visible at both low and high power. This is in stark contrast to the generally diffuse appearance of a few mornings ago. This morning the total visual magnitude seems to have increased slightly due to the presence of the bright condensation. Checks again against the DSS field show no star in the immediate vicinity of the comet which could give the appearance of a bright condensation.]
1999 Oct. 20.84 UT: m1=12.8, Dia.=0.8', DC=7/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia) [The comet seems to undergone some form of nuclear outburst again! Very prominent central condensation visible which is in stark contrast to the fairly diffuse appearance 2 nights ago. I checked the DSS image of this field to ensure that the comet wasn't sitting over the top of a field star given it the appearnce of a bright central condensation, however the DSS image does not show any star brighter than about 16-17th mag. Outer coma very difficult to detect due to the brightness of the central condensation. There is no real increase in the overall total brightness of the coma, just a very evident change in it's morphology. Amazing that this comet is still displaying this activity at nearly 10 AU from the Sun. It will be interesting if some of the professionals can obtain CCD images to confirm the outburst.]
1999 Oct. 18.84 UT: m1=12.8, Dia.=1.0', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Oct. 17.84 UT: m1=12.8, Dia.=1.1', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Oct. 16.85 UT: m1=12.8, Dia.=0.9', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Oct. 10.84 UT: m1=12.6, Dia.=0.9', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Oct. 09.85 UT: m1=12.7, Dia.=0.7', DC=2 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia) [Comet located quite close to 8th mag star which made observation difficult.]
1999 Oct. 03.84 UT: m1=12.6, Dia.=0.9', DC=2 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Oct. 02.77 UT: m1=12.4, Dia.=1.3', DC=2 ... 20-cm L (100x) ... Andrew Pearce (Gidgiegannup, Western Australia)
1999 Oct. 01.84 UT: m1=12.5, Dia.=1.4', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 19.87 UT: m1=12.5, Dia.=1.3', DC=2/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 18.84 UT: m1=12.5, Dia.=1.1', DC=2/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 17.85 UT: m1=12.4, Dia.=1.4', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 16.85 UT: m1=12.4, Dia.=1.4', DC=4 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia) [At 200x, a starlike central condensation of mag 14.3-14.5 was clearly visible which resulted in the coma appearing slightly more condensed when viewed under lower power then compared to previous observations. I don't know if this signifies any further activity in the nucleus.]
1999 Sep. 15.85 UT: m1=12.5, Dia.=1.5', DC=2 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 09.86 UT: m1=12.3, Dia.=1.6', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 05.87 UT: m1=12.5, Dia.=1.3', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 08.86 UT: m1=12.4, Dia.=1.6', DC=2/ ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 07.87 UT: m1=12.4, Dia.=1.5', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 05.87 UT: m1=12.5, Dia.=1.3', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 04.87 UT: m1=12.4, Dia.=1.4', DC=3 ... 41-cm L (90x) ... Andrew Pearce (Dowerin, Western Australia)
1999 Apr. 22.36 UT: m1=11.8, Dia.=1', DC=6 ... 25-cm L (40x) ... Stuart Rae (Palmerston North, New Zealand)
1999 Apr. 21.59 UT: m1=11.9, Dia.=0.5', DC=5 ... 20-cm L (158x) ... Michael Mattiazzo (Wallaroo, South Australia) [DC has decreased since last observation]
1999 Apr. 21.40 UT: m1=11.9, Dia.=0.8', DC=6/ ... 25-cm L (40x) ... Stuart Rae (Palmerston North, New Zealand)
1999 Apr. 19.53 UT: m1=11.7, Dia.=0.5', DC=7 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia) [comet appears to contain an almost stellar core which indicates a recent nuclear outburst has occured]
1999 Apr. 19.32 UT: m1=12.4, Dia.=1.1', DC=7/ ... 25-cm L (75x) ... Stuart Rae (Palmerston North, New Zealand) [ The coma of this comet appears to be decreasing rapidly in size! Still well condensed ]
1999 Apr. 14.48 UT: m1=11.8, Dia.=2.1', DC=6/ ... 25-cm L (40x) ... Stuart Rae (Kopane, New Zealand) [ Tonight this comet appears well condensed at 40x and 75x, with the the central coma appearing almost stellar at times. Hence I have estimated with some uncertainty DC=6/. This makes me wonder whether the 'stellar' object observed in the coma on the 12th of Apr. was perhaps a nuclear outburst and not a star as I had assumed. The 'background star' seen on the 12th ( of approx mag 13) is not visible tonight, however the limiting magnitude from Palmerston North is poorer than Kopane. The conditions tonight are very poor making observation difficult! I cannot really be sure of any of this. One thing I am certain of is that tonight and on the 12th the comet appeared very different to the 11th of Apr., when it was quite flat and diffuse.]
1999 Apr. 12.38 UT: m1=11.9, Dia.=2.4', DC=3 ... 25-cm L (40x) ... Stuart Rae (Kopane, New Zealand) [ A stellar object was seen in the comet at the time of observation. It was assumed ( though not confirmed) to be a background star and May  have affected the observation.]
1999 Apr. 11.35 UT: m1=11.8, Dia.=3', DC=3 ... 25-cm L (40x) ... Stuart Rae (Kopane, New Zealand)
1999 Apr. 07.46 UT: m1=12.0, Dia.=1', DC=3 ... 20-cm L (158x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Apr. 04.47 UT: m1=11.5, Dia.=3.2', DC=3 ... 20-cm L ... Andrew Pearce (Guilderton,Western Australia)
1999 Mar. 21.61 UT: m1=11.6, Dia.=1.5', DC=4 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Mar. 21.51 UT: m1=11.8, Dia.=1.4', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 20.52 UT: m1=11.8, Dia.=1.5', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 18.52 UT: m1=11.6, Dia.=1.5', DC=4 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Mar. 17.52 UT: m1=11.8, Dia.=1.5', DC=4 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 15.53 UT: m1=11.8, Dia.=1.3', DC=3/ ... 41-cm L ... Andrew Pearce (Nedlands,Western Australia)
1999 Mar. 14.50 UT: m1=11.6, Dia.=1.5', DC=4 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Mar. 09.53 UT: m1=11.7, Dia.=1.3', DC=4 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 07.48 UT: m1=11.5, Dia.=2', DC=5 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Jan. 25.56 UT: m1=11.0, Dia.=2', DC=3/ ... 11-cm L (16x) ... Stuart Rae (Te Awamutu, New Zealand)
1999 Jan. 24.63 UT: m1=10.8, Dia.=2', DC=3/ ... 11-cm L (16x) ... Stuart Rae (Te Awamutu, New Zealand)
1999 Jan. 21.56 UT: m1=11.2, Dia.=1.4', DC=2/ ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 20.55 UT: m1=11.3, Dia.=1.4', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 19.52 UT: m1=11.1, Dia.=1.5', DC=4 ... 20-cm L (45x) ... Michael Mattiazzo(Wallaroo, South Australia)
1999 Jan. 18.59 UT: m1=11.3, Dia.=1.5', DC=2 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 16.55 UT: m1=11.3, Dia.=1.2', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 14.78 UT: m1=11.2, Dia.=1.1', DC=2 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 14.51 UT: m1=11.1, Dia.=1.5', DC=4 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Jan. 12.57 UT: m1=11.2, Dia.=1.1', DC=2/ ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 12.52 UT: m1=11.1, Dia.=1.5', DC=5 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Jan. 11.57 UT: m1=11.1, Dia.=1.1', DC=2 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 11.51 UT: m1=11.0, Dia.=1.5', DC=5 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia)
1999 Jan. 11.48 UT: m1=10.8, Dia.=2.5', DC=5 ... 11-cmL (16x) ... Stuart Rae (Te Awamutu, New Zealand) [Comet has faded since last week, coma has enlarged. Outer coma extremely faint]
1999 Jan. 10.65 UT: m1=11.0, Dia.=1.1', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 09.60 UT: m1=11.3, Dia.=1.1', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia) [Comet very close to 10th mag star]
1999 Jan. 08.62 UT: m1=11.1, Dia.=1.1', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 07.60 UT: m1=11.2, Dia.=1.0', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 07.42 UT: m1=10.4, Dia.=2', DC=4/ ... 11-cm L (16x) ... Stuart Rae (Te Awamutu, New Zealand)
1999 Jan. 06.55 UT: m1=11.3, Dia.=1.0', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Jan. 06.41 UT: m1=10.2, Dia.=2', DC=3 ... 11-cm L (16x) ... Stuart Rae (Te Awamutu, New Zealand)
1999 Jan. 05.50 UT: m1=10.6, Dia.=2', DC=5 ... 20-cm L (45x) ... Michael Mattiazzo (Wallaroo, South Australia) [the nuclear outburst has dissipated. However, the coma now appears much more condensed than prior to the outburst]
1999 Jan. 05.41 UT: m1=10.2, Dia.=2', DC=2/ ... 11-cm L (16x) ... Stuart Rae (Te Awamutu, New Zealand)
1999 Jan. 02.69 UT: m1=11.2, Dia.=0.9', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia) [Observed with full moon present in northeast sky]
1999 Jan. 01.79 UT: m1=11.2, Dia.=1.0', DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)[Observed with full moon present in northwest sky]
1998 Nov. 29.80 UT: m1=11.0, Dia.=1.3', DC=4/ ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1998 Nov. 27.78 UT: m1=11.1, Dia.=1.3', DC=4/ ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1998 Nov. 24.78 UT: m1=11.1, Dia.=1.2', DC=5 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1998 Nov. 24.62 UT: m1=10.8, Dia.=2', DC=4 ... 20-cm L (45X) ... Michael Mattiazzo (Wallaroo, South Australia)
1998 Nov. 23.78 UT: m1=11.1, Dia.=1.6', DC=6 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia) [Coma very condensed with quite a prominent central condensation. This is a marked difference in appearance to last month where it appeared much more diffuse]
1998 Nov. 08.51 UT: m1=10.8, Dia.=2', DC=4 ... 20-cm L (45X) ... Michael Mattiazzo (Wallaroo, South Australia)
1998 Oct. 20.80 UT: m1=10.5, Dia.=1.8', DC=2/ ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1998 Oct. 19.80 UT: m1=10.5, DC=3 ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1998 Oct. 15.566 UT: m1=10.5, Dia.=2', DC=3, ... 20.3-cm L 56x ... Paul Camilleri (Cobram, Victoria, Australia)
1998 Oct. 13.62 UT: m1=10.3, Dia.=2', DC=4 ... 20-cm L (45X) ... Michael Mattiazzo (Wallaroo, South Australia)
1998 Sep. 16.63 UT: m1=10.2, Dia.=1.5', DC=4 ... 20-cm L (45X) ... Michael Mattiazzo (Wallaroo, South Australia) [I have now observed this comet for over 3 years]
1998 June 22.44 UT: m1=9.8, Dia.=2', DC=4 ... 20-cm L (x45) ... Michael Mattiazzo (Wallaroo, South Australia)
1998 June 17.38 UT: m1=9.8, Dia.=2.0', DC=5 ... 20-cm L (x45) ... Michael Mattiazzo (Wallaroo, South Australia)
1998 June 15.43 UT: m1=9.8, Dia.=1.0', DC=5 ... 20-cm L (x45) ... Michael Mattiazzo (Wallaroo, South Australia)
1998 May  18.88 UT: m1=9.6, Dia.=5' ... 23-cm L ... J. G. de S. Aguiar (Campinas, Brazil)
1998 May  17.92 UT: m1=9.6 ... 23-cm L ... J. G. de S. Aguiar (Campinas, Brazil)
1998 Apr. 26.385 UT: m1=8.8, Dia.=8', DC=5 ... 10x50 B ... Terry Lovejoy (Moranbah, QLD, Australia) [Still fairly easy to see in binoculars with an extended coma]
1998 Apr. 22.46 UT: m1=9.1, Dia.=2.0', DC=6, Tail= 3' in PA: ~75 deg ... 20-cm L(x45) ... Michael Mattiazzo (Wallaroo, South Australia) [fan like tail]
1998 Apr. 20.50 UT: m1=9.2, Dia.=3.6', DC=3 ... 20x80 B ... Andrew Pearce (Nedlands, Western Australia)
1998 Apr. 20.427 UT: m1=8.7, Dia.=-, DC=5 ... 10x50 B ... Terry Lovejoy (Moranbah, QLD, Australia)
1998 Apr. 19.48 UT: m1=9.2, Dia.=3.8', DC=3 ... 20x80 B ... Andrew Pearce (Nedlands, Western Australia)
1998 Apr. 13.50 UT: m1=9.2, Dia.=4', DC=3 ... 20x8 0B ... Andrew Pearce (Nedlands, Western Australia) [Observation made with moon visible in eastern sky, however sky at comet's location still relatively dark.]
1998 Mar. 26.402 UT: m1=8.4, Dia.=-, DC=5, Tail= trace ... 10x50 B ... Terry Lovejoy (Moranbah, QLD, Australia)