from NASACometObservation Website
recovered through WayBackMachine Website
Images Posted: June 22, 1998
Comet Hale-Bopp, 1998 May 23.4: The sum of two 200 second images with a false-colour palette applied to show detail right across the coma. This field is 10' X 12' with North up. Note the unusual feature just north of the bright nuclear region, which is shown in more detail in the image on the right. This part of the image, 3' X 2'.4 in size has been scaled up by 2 times and had an unsharp mask applied to show more of the unusual "fountain" of material on the North side of the nucleus. Copyright 1998©Gordon Garradd (gjg@mpx.com.au)
Images Posted: June 5, 1998
C/1998 J1 Comet SOHO 1998 June 01.36 This mosaic is composed of 6 X 15 second exposures for the coma, and 3 X 30 second exposures for the tail part. The coma section is also shown in false colour in the insert. The large image is 35' X 28' in size, North is up.
The image has been processed and scaled to show detail in the coma and tail, similar to the view in a large telescope. The intensity of the tail has increased during the current outburst. Taken with a 25cm f/4.1 Newtonian and HI-SIS22 CCD from Loomberah NSW Australia. Copyright 1998©Gordon Garradd (gjg@mpx.com.au)
Tri-colour CCD image of Comet Soho (C/1998 J1) on 1998 May 29.35 taken with a Cookbook 245 CCD on a 20cm f/4.5 Newtonian. 3x30 second R, 6x30 second V, 12x30 second B. Copyright 1998©Steven Lee (sl@aaocbn.aao.gov.au), URL: http://www.aao.gov.au/local/www/sl/
Images Posted: May 29, 1998
Left: Comet C/1998 J1 SOHO 1998 May 21.36 sum of 6 15 second exposures shifted to register the comet and added. Observing conditions much more favourable than May 20 with lighter winds and better seeing. North is up in this 23'x 14'.5 field of view.
The upper version is log scaled to show a view similar to that seen in a large telescope, and the lower one has a strong unsharp mask applied to show the morphology of the gas tail rays which have changed a lot in 24 hours. Taken with a 25cm Newtonian and HI-SIS 22 CCD from Loomberah NSW Australia Copyright 1998©Gordon Garradd (gjg@mpx.com.au)
Center and Right: Images of C/1998 J1 (SOHO) by David Jones (David.Jones@bigpond.com), Jondaryn, Queensland, Australia. 2 minute exposures, May 20, 1998 8:35 UT & 8:47 UT using 8" f/1.5 Schmidt Camera, 2 minutes, Hypered Kodak PJM640.
Three images of 1998 J1 (SOHO) by Robert H. McNaught (rmn@aaocbn.aao.gov.au), Bugaldie, NSW, Australia,
Left: 1998 May 19 08:30 UT, 20 sec exposure, Stationary Canon T70, 85mm f/1.4, HP5 dev 6min D19 @20C
Center: 1998 May 19 08:45 UT, 10 sec exposure on HP5 dev 6min D19 @20C, Stationary Canon T70, 55mm f/1.4
Right: 1998 May 22, start 08:46 UT, exposure 5 min, Driven Canon T70, 85mm f/1.4, Gold 400. (m1=4.5 naked-eye and 15 deg tail in 10x50B). Each image Copyright 1998©Robert H. McNaught
Left: Image of C/1998 J1 (SOHO) by Michael Horn (mhorn@b022.aone.net.au). Exposure: 4 minutes 40 seconds with 135mm lens, f4, Fuji G-800 mounted on a hand guided tracking platform. Date: 21 May 1998.
Time: 8:38 UT. Location: Lake Samsonvale, Brisbane, Australia.
Center: Comet SOHO C/1998J1 imaged by T.Lovejoy located at Jondaryn near Toowoomba, Queensland. Exposure started on May 20.36 UT, 1998 lasting 6 minutes. Instrument used a Takahashi Epsilion E-160 of 530mm focal length and f/3.3 using unhypered Fuji NPH400 120 format print film. Field of view approximately 6 degrees. lovejoyt@ozemail.com.au
Right: An image of C/1998 J1 (SOHO) from Argentina by Adrian Arquiola (obsfunes@cablenet.com.ar) taken on May 18, 1998 at 22:28 UT. Two minute exposure using a 85mm lens and 3200 ASA Black and White film.
Images Posted: May 20, 1998
Left: Comet C/1998 J1 SOHO 1998 May 20.36 Three differently processed views of the same set of 8 CCD images. The 8 images were of each 10 seconds exposure taken with the comet close to the horizon, whist the telescope was being buffetted by 60km/hr winds after after the passage of a cold front a few hours earlier. The images were shifted to register the comet, then added to give these views.
The top image has a false-colour palette applied to show the fainter extensions of the coma, particularly the broad dust sheet extending off the top (North) side of the 21'X 14' field. The central view is log scaled to show a view similar to that seen in a large telescope, and the lower image has had a strong unsharp mask applied to show the morphology of the gas tail rays. Taken with a 25cm f/4.1 Newtonian and HI-SIS 22 CCD from Loomberah NSW Australia. Copyright 1998©Gordon Garradd (gjg@mpx.com.au)
Right: Image of C/1998 J1 (SOHO) by Gonzalo Pereira, Observatorio Astronomico de Patacamaya, La Paz, Bolivia, taken on 1998 May 16.98 UT. Camera: Pentax K-1000, 50 mm lens., f/2.82, Agfa 400, exposure: 4 minutes (mounted on a telescope for tracking).
Left: Comet SOHO C/1998J1 photographed by T.Lovejoy on 1998 May 18.34 UT, from Tamborine, QLD, Australia. Exposure was 2 minutes guided on Fuji NPH400 using a Pentax 6x7 camera and 105mm lens set at f4. Note Orion at top of frame.
Right: Image of 1998 J1 (SOHO) by Michael Horn (mhorn@b022.aone.net.au). Exposure: 2 minutes with 135mm lens, f2.8, Fuji G-800 mounted on a hand guided tracking platform. Date: 20 May 1998. Time: 8:26 UT. Location: Lake Samsonvale, Brisbane, Australia.
Images Posted: May 18, 1998
Image of 1998 J1 (SOHO) by Michael Horn (mhorn@b022.aone.net.au). Exposure: 2 minutes with 135mm lens, f2.8, Fuji G-800 mounted on a hand guided tracking platform. Date: 18 May 1998. Time: 8:26 UT. Location: Lake Samsonvale, Brisbane, Australia.
Images Posted: April 27, 1998
New Comet 1998 H1 (Stonehouse) discovered by Patrick L. Stonehouse (Wolverine, Michigan)
Top: Comet 1998 H1 (Stonehouse) 1998 04 27.706. Sum of 5 40-second exposures shifted and added to register the comet. North is up in this 8' field of view. Taken with a 25cm f/4.1 Newtonian and HI-SIS 22 CCD from Loomberah NSW Australia. Copyright 1998©Gordon Garradd (gjg@mpx.com.au)
Middle: This animated GIF of 1998 H1 was obtained with a 30 cm reflector working at f/6.2. This includes 11-60 second exposures taken with a ST6 CCD. The exposures were taken on 04-27-98 between 04:30:24 - 04:46:32 UT. The image was taken by Tim Puckett. Copyright 1998©Tim Puckett
Bottom: This image of 1998 H1 (Stonehouse) was obtained with a 30 cm reflector working at f/6.2. This combines 12-60 second exposures taken with a ST6 CCD. The exposure was taken on 04-27-98 at 02:56:06 UT. The image was taken by Tim Puckett & Alex Langoussis. Copyright 1998©Tim Puckett
Images Posted: March 27, 1998
Images of 43P/Wolf-Harrington ,55P/Tempel-Tuttle, and 103P/Hartley 2 taken on 2/22/98 using a Pictor 416 CCD with a 10" LX200 @ F/3.3. The Arcturus Observatory Home Page PaulGitto@Aol.com
A recent image of the comet P/103 Hartley 2, taken on March 26. I have used a 11 inch Celestron telescope operated at f/3.3 and a SBIG ST-7. Integration time: 2 x 2 minutes. Elaboration: CCDSoft. Location: Ceccano (FR)-Italy, 178 meters above the sea level. Gianluca Masi, email: gianmasi@fr.flashnet.it, http://www.eurolink.it/comets/
Images Posted: March 13, 1998
Comet 1995 O1 Hale-Bopp 1998 Feb 21.441 120 sec exposure. North is up in this 22' X 15' field, false-colour palette applied to show detail in tail and inner coma.
The dust in the orbital plane of the comet is still faintly visible as the more upright narrower portion of the tail ( also extends off the S side of the field) with the main dust tail angled more to the left (ENE). Taken with a 25cm f/4.1 Newtonian and HI-SIS 22 CCD from Loomberah NSW Australia, 151.05E 31.33S alt 845m ASL. Copyright 1998©Gordon Garradd (gjg@mpx.com.au)
Images of Comet 69P/Taylor taken on 02/26/1998 at Osservatorio Astronomico "Don Paolo Chiavacci" Crespano del Grappa - ITALY- by G.Umbriaco and D.Bellio. The first image is the original image (sum of 10 exposures of 90 seconds, the first exposure was taken on 02-26-1998 at 20:45 UT)
The second image is a false color version. All images were obtained with the 50 cm Newton reflector working at f/5 and CCD ST-4. Copyright 1998©Osservatorio Astronomico "Don Paolo Chiavacci" ITALY
e-mail: donbosco@filippin.it; http://www.calion.com/astro/treco.htm
Left: Image of Comet 103P/Hartley 2 taken on 02/26/1998 at Osservatorio Astronomico "Don Paolo Chiavacci" Crespano del Grappa - ITALY- by G.Umbriaco and D.Bellio. The image is the sum of 10 exposures of 60 seconds, the first exposure was taken on 02-26-1998 at 19:55 UT All images were obtained with the 50 cm Newton reflector working at f/5 and CCD ST-4. All images were obtained with the 50 cm Newton reflector working at f/5 and CCD ST-4. Copyright 1998©Osservatorio Astronomico "Don Paolo Chiavacci" ITALY
Right: Drawing of 103P/Comet Hartley 2 by Nick Martin on Jan 22 1998 (19.00 UT-20.54UT) using a 50cm f4.4 L with a 9 mm Orthoscopic eyepiece.
Images Posted: February 18, 1998
Left: This image of 55P/Tempel-Tuttle was obtained with a 60 cm Ritchey Chretien reflector working at f/5. This is a 300 second exposure taken with an Apogee AP-7 CCD. The exposure was taken on 02-15-98 at 00:38:12 UT. Copyright 1998©Tim Puckett.
Right: 55P/Tempel-Tuttle on 1998 Feb. 14.78 UT. 25 second exp. CCD frames taken with 26cm f/4. Image shows several jets.
Left: An animation of Tempel-Tuttle made with 4 images. The exposure time is 3 min by frame, separate by 90 seconds. I used a 2x2 binning. I made these frames with a T130/720 Vixen and a CCD Pictor 416 XT on 22 January 1998 between 19h40 and 20h0. Lionel Parmeggiani
Right: Comet 55P/Tempel-Tuttle was obtain a 50 cm Newton reflector working at f/5. This is 600 (10x60) second exposure taken with CCD ST-4. The first exposure was taken on 01-18-1998 at 00:01 UT from G.Umbriaco and D.Bellio. Copyright 1998©Osservatorio Astronomico "Don Paolo Chiavacci" ITALY e-mail: donbosco@filippin.it; http://www.calion.com/astro/treco.htm
Images Posted: February 10, 1998
Comet 29P Schwassmann-Wachmann 1. 1998 Feb 2.66, sum of 2 120 sec exposures. North is up, the image has been scaled up 2X, and a false-colour pallette applied. Taken with a HI-SIS 22 CCD and 25cm f/4.1 Newtonian from Loomberah NSW Australia. Copyright 1998©Gordon Garradd gjg@mpx.com.au
An animation of 55P/Temple-Tuttle taken on 1/11/98 from 5:23 UT to 6:15 UT with the Moon @ 96% Illumination Animation is a cropped series of 1 minute exposures of a Pictor 416 CCD with a 10" LX200 @ F/3.3. The Arcturus Observatory Home Page PaulGitto@Aol.com
Images Posted: January 26, 1998
Left: Comet 1995 O1 Hale-Bopp 1998 Jan 17.47 mosaic of 3 100 sec exposures, field 22' X 37', North is up. The thin sheet of heavy dust is still visible, although fainter now, as we move away from the orbital plane of the comet. False-colour palette applied. Taken with a 25cm f/4.1 Newtonian and HI-SIS 22 CCD from Loomberah NSW Australia. Copyright 1998©Gordon Garradd gjg@mpx.com.au
Right: 29P/S-W 1 in outburst on 1998 Jan. 25.85, m1=13.7 with very strong condensation. Inst. 0.25-m f/6 L + ST-6 CCD exp. 120sec. Takuo Kojima (Notice how stellar the comet appears...this is typical for the beginning of an outburst...csm)
Left: This animated GIF of 55P/Tempel-Tuttle was obtained with a 60 cm Ritchey Chretien reflector working at f/5. This is (12) 300 second exposures taken with an Apogee AP-7 CCD. The first exposure was taken on 01-26-98 at 00:31:46 UT last exposure 01:30:58 UT. Copyright 1998©Tim Puckett.
Images Posted: January 20, 1998
Left: Comet Hale-Bopp, 1998 January 4.7, a mosaic of 2 60 sec exposures processed to show the faint tail ( dust particles in the plane of the orbit, made visible as we pass through the plane and see it edge-on ) It extends well off the frame in both directions, the lower extension being the anti-tail. A false-colour palette has been applied. Field size is 22' X 23'.5 and North is up. Taken with a 25cm Newtonian and HI-SIS 22 CCD from Loomberah NSW Australia. Copyright 1998©Gordon Garradd
Right: This image of Hale-Bopp is a mosaic of 3, 4 minute exposures through my 20cm f/4.5 Newtonian and Cookbook 245 CCD; covering about 3/4 degree in declination by 0.4 degrees RA. Taken 1998/01/02 about 11h UT. Copyright 1998©Steven Lee. URL: http://www.aao.gov.au/local/www/sl/ e-mail: sl@aaocbn.aao.gov.au
Left: This image of 55P/Tempel-Tuttle was obtained with a 60 cm Ritchey Chretien reflector working at f/5. This is a 900 second exposure taken with an Apogee AP-7 CCD. The exposure was taken on 01-18-98 at 02:17:00 UT. Copyright 1998©Tim Puckett.
Right: This image of 55P/Temple-Tuttle was obtained with a 60 cm Ritchey Chretien reflector working at f/4.9. This is 10- 300 second exposure taken with an Apogee AP-7 CCD. The first exposure was taken on 01-18-94 at 01:43:00 UT. Copyright 1998©Tim Puckett.
Left: 55P/Temple-Tuttle, Date: Jan. 08 1998 21.40 TU, Newton D=350mm F=1740mm F/D=4.9, CCD Sbig ST-7, Sum of 20 individual exposures by 40 seconds, Authors: Moretti S. and Tomaselli S., Ca' Bionda Observatory - FORLI' (ITALY)
Right: Comet 103P/Hartley2, 1997 Dec. 24, 2 x 4 = 8 min exposure., Telescope: Celestron CG-11, operated at F/6.3 with a reducer/corrector; CCD: SBIG ST-7, autoguiding feature used; Elaboration: CCDSoft; Location: Ceccano (FR)-Italy, 178 meters above the sea level. Author: Gianluca Masi gianmasi@fr.flashnet.it, http://www.eurolink.it/comets/
Images Posted: December 3, 1997
46P/Wirtanen has been selected as target for ESA's Rosetta mission. To characterize the comet and set constraints on the spacecraft and experiment design, observations were performed on Pik Terskol. Shown is a three color image of the faint comet, that clearly separates the three cometary components dust, neutral gas and ions. We observed the cometary H2O+, dust and neutral CN gas with the filters IF 614, RX and IF 390. In the above image they are represented in red, green and blue, respectively.
For the first time Wirtanens ion tail (here H2O+) could be imaged, visible as straight red diffuse band to the left side (anti-sunward direction). The blue sphere is the very extended neutral CN Coma. In contrast to this, the dust is much more concentrated and dominates the near nucleus region, here seen as yellowish green color. So one result, illustrated with this three color image, is that 46P/Wirtanen is dust poor and about 2-3 times less dusty than Comet Halley. (T. Credner)
Date: 11.3.1997, Time: 16:42 UT, Exposure: 30m, 10m, 30m, Field of View: 6.2' x 4.7', Receiver: (576x387) + 5122 CCD, Filter: IF 614, RX, IF 390, Instrument: D=2m, f=5.6m, Observatory: Pik Terskol, Caucasus, Observer: K. Jockers, T. Credner, T. Bonev (http://www.mpae.gwdg.de/mpae_projects/gbo/terskol.html)
Left: This image of 78P/Gehrels 2 was obtained with a 60 cm Ritchey Chretien reflector working at f/4.9. This is a 300 second exposure taken with an Apogee AP-7 CCD. The exposure was taken on 11-24-97 at 08:35:07 UT. Copyright 1997©Tim Puckett.
Center: This image of C/1997 D1 (Mueller) was obtained with a 60 cm Ritchey Chretien reflector working at f/4.9. This is a 300 second exposure taken with an Apogee AP-7 CCD. The exposure was taken on 11-24-97 at 07:30:50 UT. Copyright 1997©Tim Puckett.
Right: Image of the C/1997 J2 (Meunier-Dupouy) taken on 30 Aug. 1997 using a Vixen SP R-150S, 150 mm f/5 and a SBIG ST-7 CCD camera. Exposure time: 10 min. Location: Ceccano (FR) Italy, 213 m above sea level. Author: Gianluca Masi, gianmasi@fr.flashnet.it, http://www.eurolink.it/comets/ [The comet looks almost like a star....csm]
Images Posted: October 29, 1997
This image of C/1997 T1 (Utsunomiya) was obtained with a 60 cm Ritchey Chretien reflector working at f/8. This is a composite of 10 -60 second exposures taken with an Apogee AP-7 CCD. The first exposure was taken on 10-28-97 at 23:54:02 UT, Last exposure taken 00:04:59. The image was taken by Tim Puckett. Copyright©1997
Left: This image of C/1997 T1 (Utsunomiya) by Ralph Pass is a combination of 24 images. Each image was a 90 second exposure taken with a Pictor 416 attached to a Meade LX200 10" F/6.3 telescope. Each image was corrected by subtracting a dark frame, dividing by a flat field, and then median filtered.
The images were then combined using the head of the comet as a reference. After combining, the image was averaged over 2x2 boxes to reduce the picture size. The resulting image was logarithmically stretched. The first image was taken starting at October 22, 1997, 01:22UT. The last image was taken starting at October 22, 1997 02:22UT.
Right: An image of Comet Utsunomiya on October 24 taken by Nick James. The image is a stack of 39 40-second exposures obtained with an SX CCD camera at the focus of my 30-cm f/5.25 Newtonian. This telescope is sited in Chelmsford, England.
Images Posted: October 21, 1997
C/1995 O1 Hale-Bopp 1997 Oct 10.76. 6 minute exposure during twilight on = hypered Kodak Gold III 400, North is up in this approximate 1.2 degree = square field scanned from the negative. Taken with a 25cm f/4.1 = Newtonian from Loomberah NSW Australia. Copyright©1997 Gordon Garradd
Images Posted: October 17, 1997
This image of C/1997 T1 (Utsunomiya) was obtained with a 60 cm Ritchey Chretien reflector working at f/8. This is a composite of 10 -300 second exposures taken with an Apogee AP-7 CCD. The first exposure was taken on 10-15-97 at 02:56:51 UT. The image was taken by Tim Puckett. Copyright©1997
Left: This image of C/1997 T1 (Utsunomiya) by Ralph Passis a combination of 29 images. Each image was a 90 second exposure taken with a PIctor 416 attached to a Meade LX200 10" F/6.3 telescope. A focal reducer was used to convert the system to an F/4 telescope.
Each image was corrected by subtracting a dark frame and dividing by a flat field. The images were combined using the head of the comet as a reference. After combining, the image was averaged over 2x2 boxes to reduce the picture size. The resulting image was logarithmically stretched. The first image was taken starting at October 13, 1997, 01:08UT. The last image was taken starting at October 13, 1997 02:08UT.
Right: Image of C/1997 T1 (Utsunomiya) taken by Tom Polakis (Tempe, AZ) on Oct. 17, 1997 UT in bright Moonlight.
These charts, which were provided by Dale Ireland, show the orbit of C/1997 T1 (Utsunomiya). (Click on image for larger view.)
Images Posted: October 9, 1997
This animated gif of C/1997 T1 (Utsunomia) by Paul Gitto was compiled from images taken on 10/8/97 1:05 UT. Images were obtained with an 25cm LX 200 @F3.3 and a Meade Pictor 416 CCD camera...90 sec duration. Images are copyright of the Arcturus Observatory. Additional information can be found at The Arcturus Observatory home page.
Images Posted: October 8, 1997
Left: This animated gif movie of C/1997 T1 (Utsunomiya) was obtained with a 60 cm Ritchey Chretien reflector working at f/8. This is 15 -300 second exposures taken with an Apogee AP-7 CCD. The first exposure was taken on 10-07-97 at 03:35:05 UT. The images were taken by Tim Puckett,
Right: Image of C/1997 T1 (Utsunomiya) taken by Tom Polakis (Tempe, AZ) on Oct. 7.25, 1997 UT.
Images Posted: October 7, 1997
This image of C/1997 T1 (Utsunomiya) was obtained with a 60 cm Ritchey Chretien reflector working at f/8. This is a composite of 15 -300 second exposures taken with an Apogee AP-7 CCD. The first exposure was taken on 10-07-97 at 03:35:05 UT. The images were tracked using the telescope's orbital element tracking drive system. The image was taken by Tim Puckett.