Obs1998

1998 Visual & CCD Observations
Año 1998 – Observaciones Visuales y CCD de Cometas

C/1995 O1 (Hale-Bopp)
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, Tail= - ... 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 ... 20x80B ... Andrew Pearce (Nedlands, Western Australia)
1998 Apr. 20.427 UT: m1=8.7, Dia.=-, DC=5, Tail= - ... 10x50 B ... Terry Lovejoy (Moranbah, QLD, Australia)
1998 Apr. 19.48 UT: m1=9.2, Dia.=3.8', DC=3 ... 20x80B ... Andrew Pearce (Nedlands, Western Australia)
1998 Apr. 13.50 UT: m1=9.2, Dia.=4', DC=3 ... 20x80B ... 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)

C/1997 J2 (Meunier-Dupouy)
1998 June 04.59 UT: m1=11.4, Dia.=1.5', DC=5 ... 25.6-cm L (42x) ... Nicolas Biver (Koko-Head, Oahu, Hawaii)
1998 June 02.08 UT: m1=11.1, Dia.=1.5', DC=3 ... 20-cm. SCT (80x) ... Massimo Dionisi (Sassari, Italy)
1998 May  31.98 UT: m1=11.2, Dia=1.8', DC=2  ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  30.98 UT: m1=11.4, Dia=1.7', DC=1/ ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  30.94 UT: m1=11.6, Dia.=0.7', DC=3 ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1998 May  29.98 UT: m1=11.5, Dia.=1.6', DC=2  ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  26.52 UT: m1=11.4, Dia.=1.5', DC=3 ...  25.6-cm L (42x) ... Nicolas Biver (Dillingham, Oahu, Hawaii)
1998 May  24.53 UT: m1=11.5, Dia.=1.5', DC=3 ...  25.6-cm L (42x) ... Nicolas Biver (Dillingham, Oahu, Hawaii)
1998 May  23.98 UT: m1=11.1, Dia.=2.3', DC=2  ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  17.99 UT: m1=11.4, Dia.=1.4', DC=2 ... 25.4-cm L (104x) ... Maik Meyer (Frauenstein, Germany)
1998 May  02.04 UT: m1=11.6, Dia.=1.4', DC=2 ... 25.4-cm L (104x) ... Maik Meyer (Frauenstein, Germany)
1998 May  01.04 UT: m1=11.0, Dia.=1.4', DC=1-2 ... 25.4-cm L (65x) ... Maik Meyer (Frauenstein, Germany)
1998 May  01.02 UT: m1=11.6, Dia.=2' ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 Apr. 30.02 UT: m1=11.5, Dia.=2' ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 Apr. 29.60 UT: m1=11.7, Dia.=1.8', DC=4 ... 25.6-cm L (84x) ... Nicolas Biver (Koko Head, Oahu, Hawaii) [Extended in p.a. 330]
1998 Apr. 29.00 UT: m1=11.8, Dia.=0.8`, DC=2 ... 30-cm L (100x) ... Vitali Nevski (Vitebsk, Belarus)

C/1997 T1 (Utsunomiya)
1998 May  15.92 UT: m1=14.4, Dia.=0.3', DC=3 ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1998 Apr. 26.47 UT: m1=13.4, Dia.=0.8', DC=5 ... 25.6-cm L (84x) ... . Nicolas Biver (Dillingham, Oahu, Hawaii)
1998 Apr. 22.55 UT: m1=[12.5 ... 20-cm L (x158) ... Michael Mattiazzo (Wallaroo, South Australia)
1998 Mar. 09.62 UT: m1=12.5, Dia. 1.4', DC=2 ... 25.6-cm L (84x) ... Nicolas Biver (Koko Head, Oahu, Hawaii)
1998 Mar. 08.61 UT: m1=12.6, Dia. 1.5', DC=3 ... 25.6-cm L (84x) ... Nicolas Biver (Koko Head, Oahu, Hawaii)
1998 Mar. 04.60 UT: m1=12.1, Dia. 1.5', DC=2 ... 25.6-cm L (84x) ... Nicolas Biver (Koko Head, Oahu, Hawaii)

C/1998 H1 (Stonehouse)
1998 May  31.99 UT: m1=11.9, Dia.=1'.4, DC=3  ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  30.95 UT: m1=11.7, Dia.=1'.5, DC=3/ ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine) [Outburst in progress]
1998 May  30.89 UT: m1=12.2, Dia.=2.3', DC=2 ... 44-cm L (63x) ... Werner Hasubick (Bu chloe, Germany)
1998 May  29.94 UT: m1=11.8, Dia.=1'.5, DC=3 ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine) [Possible outburst, coma increase in condensation decrease in size.]
1998 May  28.92 UT: m1=12.3, Dia.=1'.8, DC=1 ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  26.31 UT: m1=12.0, Dia.=2', DC=1 ... 25.6-cm L (42x)  ... Nicolas Biver (Dillingham, Oahu, Hawaii)
1998 May  23.92 UT: m1=12.1, Dia.=2'.1, DC=2/ ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  23.12 UT: m1=11.5, Dia.= ~2.0', DC=1 ... 41-cm L @ 70x ... J. Bortle (Stormville, NY) [Extremely diffuse.]
1998 May  19.11 UT: m1=11.3, Dia.= ~2.5', DC=1 ... 41-cm L@70x ... J. Bortle (Stormville, NY) [Very diffuse, ill-defined object.]
1998 May  17.95 UT: m1=11.4, Dia.=2.2', DC=1-2 ... 25.4-cm L (65x) ... Maik Meyer (Frauenstein, Germany)
1998 May  17.94 UT: m1=11.6, Dia.=2'.5, DC=2 ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  17.17 UT: m1=11.1, Dia.=2.4', DC=2 ... 20-cm L @ 47X ... Phillip J. Creed (M assillon, Ohio) [Comet difficult but definite object under suburban skies. NLM= 5.7]
1998 May  16.90 UT: m1=11.4, Dia.=3', DC=2/ ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  15.90 UT: m1=11.6, Dia.=1.9', DC=3, 44-cm L (63x) ... Werner Hasubick (Buchloe, Germany)
1998 May  14.88 UT: m1=11.4, Dia.=1.0', DC=3, 20-cm T (93x) ... Werner Hasubick (Buchloe, Germany)
1998 May  14.22 UT: m1=10.8 CCD, Dia.=3', DC=3 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory, CU)
1998 May  13.88 UT: m1=11.0, Dia.=3', DC=3 ... 15-cm L (53x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  12.83 UT: m1=11.0, Dia.=3'.5, DC=2/ ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 May  11.27 UT: m1=10.8 CCD, Dia.=2', DC=3 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory,CU) [4' tail present in image despite full moon]
1998 May  04.72 UT: m1=10.8, Dia.=2', DC=2 ... 41-cm L (x90) ... Andrew Pearce (Nedlands, Western Australia)[Observation made slightly difficult by the fact that comet located close to 4th magnitude star]
1998 May  02.50 UT: m1=10.5, Dia.=3'.3, DC 4 ... 25.6-cm f/4.95 L (84x) ... Håkon Dahle (Kaena Point, Oahu, HI, USA) [Seq. Tycho Catalogue, MM=Sidgwick. No tail visible. NLM=6.5.]
1998 May  02.02 UT: m1=11.0, Dia.=2.5', DC=2 ... 25.4-cm L (65x) ... Maik Meyer (Frauenstein, Germany)
1998 May  01.94 UT: m1=10.4, Dia.=7', DC=2 ... 20-cm L (70x) ...  Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 Apr. 30.99 UT: m1=10.7, Dia.=3.5', DC=3-4 ... 25.4-cm L (65x) ... Maik Meyer (Frauenstein, Germany) [No enhancement with a Swan Band Filter.]
1998 Apr. 30.96 UT: m1=10.6, Dia.=7', DC=2 ... 11-cm L (50x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 Apr. 30.82 UT: m1=10.4, Dia.=2.1', DC=3 ... 25X100 B ... Werner Hasubick (Buchloe, Germany)
1998 Apr. 30.19 UT: m1=11.0, Dia.=5', DC=2 ... 25.4-cm L (f/4.5, 68x) ... Michael Doyle (NW of Bertram, TX)
1998 Apr. 29.95 UT: m1=10.4, Dia.=10', DC=1 ... 20-cm L (40x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine) [At the last day coma became more diffuse, increased in size and increased in total bright ... fan - like coma, possible tail and star - like nucleus]
1998 Apr. 29.59 UT: m1=10.9, Dia.=3.5', DC=3 ... 25.6-cm L (42x) ... Nicolas Biver (Koko Head, Oahu, Hawaii) [Faint central condensation around m=13.6 ... extended in PA 200]
1998 Apr. 29.58 UT: m1=11.5:, Dia.=2.0', DC=2 ... 20-cm L(x45) ... Michael Mattiazzo(Wallaroo, South Australia)
1998 Apr. 29.25 UT: m1=10.5 CCD, Dia.=5', DC=2 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory,CU) [Short tail, rapid motion]
1998 Apr. 28.98 UT: m1=10.6, Dia.=7', DC=3 ... 15-cm L (32x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 Apr. 28.02 UT: m1=11.0, Dia.=4.5', DC=2 ... 20-cm L (70x) ... Alexandr Baransky (Observatory of Kyiv University, Ukraine)
1998 Apr. 26.99 UT: m1=10.2, Dia.=6', DC=2 ... 20x100 B ... Maik Meyer (Frauenstein, Germany) [motion obvious w/in minutes ... diffuse and not easy]
1998 Apr. 26.24 UT: m1=10.7, Dia.=4.5', DC=2 ... 41-cm L ... Alan Hale (Cloudcroft, NM)

C/1998 J1 (SOHO)
1998 June 08.89 UT: m1=6.2 ... 11x80 B ... Willian Souza (Sao Paulo , Brazil)
1998 June 08.40 UT: m1=5.8, Dia.=5', DC=5 ... 7X50B ... Michael Mattiazzo, Wallaroo, South Australia)
1998 June 08.35 UT: m1=5.7, Dia.=4', DC=6, Tail= - ... 10x50 B ... Terry Lovejoy (Thornlands, QLD, Australia) [Clearly visible in binoculars as a small bright globular object with no obvious tail - despite near full moon ]
1998 June 07.90 UT: m1=6.5, Dia.=1',DC=3 ... 5-cm f/12.6R (50x) ... Alexandre Amorim (Florianopolis, SC/Brazil).
1998 June 07.90 UT: m1=6.2, Dia.=1', DC=3 ... 11x80 B ... Willian Souza (Sao Paulo, Brazil)
1998 June 07.88 UT: m1=5.8 ... 11x80 B ... J. G. de S. Aguiar (Campinas, Brazil) [moonlight interference]
1998 June 07.40 UT: m1=5.7, Dia.=5',DC=5 ... 7X50B ... Michael Mattiazzo, Wallaroo, South Australia)
1998 June 06.90 UT: m1=5.8, Dia.=1', DC=4 ... 11x80 B ... Willian Souza (Sao Paulo, Brazil)
1998 June 06.46 UT: m1=5.7, Dia.=6.2', DC=6 ... 20x80B ... Andrew Pearce (Nedlands, Western Australia)
1998 June 06.40 UT: m1=5.5, Dia.=5',DC=5 ... 7X50B ... Michael Mattiazzo, Wallaroo, South Australia)
1998 June 05.89 UT: m1=5.5, Dia.=6': ... 11x80 B ... J. G. de S. Aguiar, Campinas, Brazil) [comet very distinctly blue]
1998 June 05.27 UT: m1=5.6, Dia.=1':, DC=5, Tail= NoTail ... 10x50B ... Stuart Rae (Palmerston North, New Zealand) [Note Dia=approx, moonlit sky]
1998 June 04.89 UT: m1=4.7, Dia.=5', DC=4 ... 11x80 B ... Willian Souza (Sao Paulo, Brazil)
1998 June 03.97 UT: m1=3.9, Dia.=1', DC=6, Tail= No tail ... 15-cm L f/8 ... Gregorio Drayer (Caracas, Miranda, Venezuela) [The sky was clear on the horizon.Its position was R.A.=6h40', dec=-19 25']
1998 June 03.361 UT: m1=4.4, DC=5, Tail= 0.5 deg. in PA 141 deg ... 8x25 B ... Michael Horn (Brisbane, Australia)
1998 June 02.91 UT: m1=5.5, Dia.=2', DC=4 ... 5-cm f/12.6 (50x and 150x-with Barlow lens) ... Alexandre Amorim (Florianopolis, SC/Brazil) [No tail observed. Magnitude estimated using a 5th-mag.star just 0.3deg SE from the comet.]
1998 June 02.975 UT: m1=4.0, Dia.=~1.2', DC=5, Tail= No tail ... 15-cm L f/8 ... Gregorio Drayer (Caracas, Miranda, Venezuela) [I saw it for nearly 6.5 minutes. There were some clouds. It was nealy 12 degrees above the horizon. The coma was blue and its nucleus was bright ...there was more contrast between the nucleus and the coma than before. Its position wasn't what spected in the Dale Ireland chart. Declination~(-17.5)]
1998 June 01.903 UT: m1=3.5, Dia.=3.5', DC=4, Tail= ~0.3deg ... 5-cm R f/12.6 (50x and 75x) ... Alexandre Amorim (Florianopolis, SC/Brazil) [The comet was visible in the nacked eye.There was no disruption observed.]
1998 June 01.40 UT: m1=3.4, Dia.=6', DC=6 ... 7X50B ... Michael Mattiazzo, Wallaroo, South Australia) [This evening, comet SOHO has undergone an outburst, appearing as an intense blue green disk of third magnitude. In a 20-cm reflector at 160X, there is no indication of nuclear disruption.]
1998 June 01.35 UT: m1=3.7 ... Naked Eye ... Gordon Garradd (Loomberah Australia) [Nuclear region CCD magnitude measures have also shown a recent increase as follows - ( mean of reported magnitudes for central 7 pixels = ~13" ) ( also an increase on May 29): May 24.35, 11.1 ... 25.35, 11.2 ... 26.35, 11.6 ... 28.37, 12.0 ... 29.37, 11.3 ... 30.37, 12.6 ... 31.35, 12.0 ... and Jun 01.36, 10.9]
1998 May  31.89 UT: m1=5.6, Dia.=5' ... 23-cm L ... J. G. de S. Aguiar, Campinas, Brazil) [Remarks: COMET IS DISTINCTLY BLUE; Moonlight interference.]
1998 May  30.89 UT: m1=5.5, Dia.=5' ... 11x80B ... J. G. de S. Aguiar (Campinas, Brazil)
1998 May  30.345 UT: m1=5.4, DC=7, Tail= 1 deg. in PA 135 deg ... 31-cm Newt f/4.5 (42x) ... Michael Horn (Dayboro, Queensland, Australia) [Coma still has distinct blue-green colour. Tail appeared faint posibaly due to the 4.5 day moon about 40 deg to north-east.]
1998 May  29.44 UT: m1=5.4, Dia.=3.8', DC=7 ... 20x80B ... Andrew Pearce (Nedlands, Western Australia) [Thin cirrus cloud present made tail hard to see apart from the very bright section immediately adjacent to the coma.]
1998 May  28.96 UT: ml=5.1, Dia.=3', DC=7, Tail= PA 280 ... 10x50 B ... Mario J. Avila-Sobarzo (Santiago de Chile) [There was light showers during this afternoon. Sky was visible through gaps in the clouds. The Santiago's atmosphere is characterized, this time of the year, having fog, mist and the like. The atmosphere was poor quality due high humidity reflecting lights from city. Observation was individual. No tail was observer, the comet's shape was apparently elongated, however.]
1998 May  28.90 UT: m1=5.9, Dia.=4', DC=6, ... 11.4-cm L f/7.9 (45X)  ...  Vanius D. Pasuch (Antonio Prado, RS/Brazil) [Tail: almost invisible because moonlight and city glare]
1998 May  28.40 UT: m1=5.4, Dia.=5', DC=5, tail= >2 deg(gas) inPA 140 deg ... 7X50B ... Michael Mattiazzo,Wallaroo, South Australia)
1998 May  27.91 UT: m1=5.5, Dia.=5', DC=7, Tail= 1 deg in PA 139 deg (Moonlight. Tail very faint) ...  20x50B ... Vanius D. Pasuch (Antonio Prado, RS, Brazil)
1998 May  27.39 UT: m1=5.4, Dia.=5',DC=5 ... 7X50B ... Michael Mattiazzo (Adelaide,South Australia) [ Through gap in clouds ]
1998 May  27.361 UT: m1=5.7, DC=6, Tail at least 1d PA 110d ... 32-cm Newt (65x) ... Peter Nelson (Ellinbank, Victoria, Australia) [Observation poor, low and entering trees. No atmospheric extinction allowance. Comp star SAO151098, Hipparchos seq. Defocus method.]
1998 May  26.97 UT: m1=5.0, Dia.=2', DC=7, Tail=No tail seen ... 6"L f/8 ... Gregorio Drayer (Caracas, Miranda / Venezuela)
1998 May  26.345 UT: m1=5.0, DC=7, Tail= 2 deg. in PA 134 deg ... 8x25 B ... Michael Horn (Lake Samsonvale, Brisbane, Australia)
1998 May  25.88 UT: m1=5.3 ,Dia.=3', DC=7  ... 11x80 B ... Willian Souza (Sao Paulo, Brazil)
1998 May  24.91 UT: m1=4.4, Dia.=7.2', DC=5, Tail=3 deg ... 7x50 B and 0.09m MCT ... . Nelson Falsarella (Sao Jose do Rio Preto/SP/Brazil) [Green Coma]
1998 May  24.44 UT: m1=4.5, Dia.=3', DC=7 ... 20x80B ... Andrew Pearce (Nedlands, Western Australia) [Thin cirrus cloud present may have affected tail length estimate however tail 1.5 deg long in PA 110 deg.]

C/1998 K2 (LINEAR)
1998 Jun. 04.56 UT: m1=12.6, Dia.=0.8', DC=5 ... 25.6-cm L (84x) ... Nicolas Biver (Koko-Head, Oahu, Hawaii)
1998 Jun. 02.64 UT: m1=12.6, Dia.=1.5', DC=4 ... 20-cm L (158X) ... Michael Mattiazzo (Wallaroo, South Australia) [first observation, reasonably condensed object ]
1998 May  31.27 UT: m1=13.1, Dia.=0.81', DC=3.5 ... 51-cm L (185x) ... Charles S. Morris (Lockwood Valley, CA) [Comet had a stellar condensation of m2~15.0. Corrected for extinction.]
1998 May  27.21 UT: m1=12.5:, Dia.=1.2', DC=2 ... 38-cm L (245x)  ... Bob King (Duluth, MN) [Somewhat condensed, faint hazy glow. Coma circular, no tail seen. Motion to southwest easily observed over 45 minutes. Comet at low altitude but sky very clear with excellent seeing.]
1998 May  26.46 UT: m1=12.7, Dia.=0.7', DC=6 ... 25.6-cm L (84x) ... Nicolas Biver (Dillingham, Oahu, Hawaii) [Small, condensed, relatively easy]

21P/Giacobini-Zinner
1998 May  28.25 UT: m1=15.2 CCD, Dia.=30", DC=1 ... 31.25-cmL/ST7 ... Tom Johnston (Views Brothers Observatory, Luna Lake, AZ)

29P/Schwassmann-Wachmann 1
1998 May  15.88 UT: m1=[14.0 ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1998 Apr. 22.54 UT: m1=[12.5 ... 20-cm L(x158) ... Michael Mattiazzo(Wallaroo, South Australia)
1998 Apr. 19.33 UT: m1=13.5 CCD, Dia.=1', DC=1 ... 45-cmCASS/ST6 ... Tom Johnston(Sommers-Bausch Observatory, CU)[Diffuse]
1998 Mar. 25.29 UT: m1=12.5 CCD, Dia.=2', DC=2 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory, CU)[Short fan tail]
1998 Mar. 21.06 UT: m1=12.6, Dia.=2', DC=2 ... 32-cm L (75x) ... J. M. San Juan (Avila, Spain)
1998 Mar. 21.05 UT: m1=12.8, Dia.=1.5', DC=2 ... 32-cm L (75x) ... J. Carvajal (Avila, Spain)
1998 Feb. 28.47 UT: m1=13.8, Dia.=0.5', DC=2 ... 25.6-cm L (169x) ... Nicolas Biver (Makaha, Oahu, Hawaii)
1998 Feb. 28.03 UT: m1=14.3, Dia.=0.5', DC=0 ... 44.5-cm L (100x) ... J. Carvajal (Avila, Spain)
1998 Feb. 26.56 UT: m1=13.2, Dia.=1', DC=2 ... 25.6-cm L (84x) ... Nicolas Biver (Koko Head, Oahu, Hawaii)
1998 Feb. 22.60 UT: m1=[13 ... 20-cm L(x158) ... Michael Mattiazzo (Wallaroo, South Australia) [suspected observation at limit of telescope ]
1998 Feb. 2.75 UT: m1=12.8, Dia.=2.5', DC=3 ... 41-cm L (180x) ... M. Clark (Yericoin, Western Australia)

62P/Tsuchinshan 1
1998 May  15.85 UT: m1=12.9, Dia.=0.6', DC=3 ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1998 Mar. 25.08 UT: m1=13.5 CCD, Dia.=1', DC=1 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory, CU) [Has brightened greatly]
1998 Mar. 15.10 UT: m1=15.4 CCD, Dia.=1', DC=1 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory,CU) [No tail seen in movie]

69P/Taylor
1998 May  15.86 UT: m1=13.9, Dia.=0.3', DC=3 ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1998 Mar. 25.15 UT: m1=11.9 CCD, Dia.=1.5', DC=2 ... 45-cmCASS/ST6 ... Tom Johnston(Sommers-Bausch Observatory, CU)
1998 Mar. 20.99 UT: m1=11.9, Dia.=4', DC=1 ... 10-cm R (45x) ... J. Carvajal (Avila,Spain)
1998 Mar. 01.99 UT: m1=11.9, Dia.=1.6', DC=3 ... 38-cm L (55x) ... Johan Warell (Sandvreten, Sweden) [Quite diffuse but with lighter center, round. Very thin Cirrostratus at comet's location.]
1998 Mar. 01.16 UT: m1=11.7 CCD, Dia.=2.5', DC=4 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory,CU)

88P/Howell
1998 May  14.21 UT: m1=14.7 CCD, Dia.=30", DC=2 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory, CU) [Small but condensed]
1998 Apr. 19.35 UT: m1=14.5 CCD, Dia.=50", DC=1 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory, CU)
1998 Apr. 05.29 UT: m1=14.5 CCD, Dia.=30", DC=3 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory, CU)

103P/Hartley 2
1998 Apr. 13.48 UT: m1=12.5:, Dia.=1.3', DC=2 ... 41-cm L (x200) ... Andrew Pearce (Nedlands, Western Australia) [Hurried observation = made between breaks in the cloud] 
1998 Mar. 25.12 UT: m1=12.2 CCD, Dia.=1.5', DC=1 ... 45-cmCASS/ST6 ... Tom Johnston(Sommers-Bausch Observatory, CU)
1998 Mar. 22.12 UT: m1=11.5 CCD, Dia.=2', DC=2 ... 45-cmCASS/ST6 ... Tom Johnston(Sommers-Bausch Observatory)[Fading]
1998 Mar. 20.93 UT: m1=11.9, Dia.=2', DC=1/ ... 32-cm L (75x) ... J.Carvajal (Avila, Spain)
1998 Mar. 20.93 UT: m1=11.7, Dia.=2', DC=1 ... 32-cm L (75x) ... J. M. San Juan (Avila, Spain)
1998 Mar. 01.85 UT: m1=11.9, Dia.=1.9', DC=2 ... 38-cm L (55x) ... Johan Warell (Sandvreten, Sweden) [Diffuse, round. Low altitude.]
1998 Mar. 01.78 UT: m1=10.0, Dia.=4.2', DC=1-2 ... 7.0-cm R f/6.8 (24x) ... Bjørn H. Granslo (Tryvann, Oslo, Norway) [Comet was very faint but seen at the correct position. The Moon did not interefere to this observation. Very transparent atmosphere (NLM=~5.7). Altitude 30 deg. Magnitudes of nearby comparison stars were taken from the Tycho catalogue.]
1998 Mar. 01.26 UT: m1=10.8, Dia.=3', DC=2 ... 25.6-cm L (42x) ... Nicolas Biver (Dillingham, Oahu, Hawaii)
1998 Mar. 01.12 UT: m1=10.0 CCD, Dia.=3', DC=3 ... 45-cmCASS/ST6 ... Tom Johnston (Sommers-Bausch Observatory,CU)

10P/Tempel 2
1998 Mar. 24.46 UT: m1=18.6 CCD ... 1.2-m reflector + CCD ... R. Bambery, E. Helin, S. Pravdo, M. Hicks, K. Lawrence, P. Kervin, T.Prystavski (Near-Earth Asteroid Tracking NEAT, MPC 608)

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