53K
Observer: Bill Hutchinson
Location: Kenai National Wildlife Refuge, Alaska
Date: April 13, 1997
Nikon N90 50mm lens at f 2.8 30 seconds on Fuji 400 HG.
62K
Observer: Bob Yen
Location: Mojave Desert, California
Date: April 13, 1997
31K
Observer: Joe Dawson
Location: Sante Fe, New Mexico
Date: April 13, 1997
Image taken with Kodak RG 1000. The image is a 1-minute exposure using a 200mm Zuiko lens at f/4.0.
16K
Observers: Iannarilli Gianluca, Paniccia Benito
Location: Veroli, Italy
Date: April 13, 1997
1. Hale-Bopp and Pleiades. 50 mm lens f/1.4 exp. 45 sec - Kodak Gold 400.
2. Hale-Bopp and Capella. 50 mm lens f/1.4 exp. 70 sec - Kodak Gold 400.
5K
Observer: Mark Toups
Location: Round Top, Texas
Date: April 13, 1997
Photo taken with Hasselblad 180mm lens @f4.0 and 3200 hypered Konica film, 20 seconds.
8K
Observers: Alberto Quijano Vodniza, Jose Alonso
Location: Mayaguez, Puerto Rico
Date: April 13, 1997 00:01 UT
First image was taken with a ST-6 CCD camera through a 5 inch, F10 reflector. 5.0 sec exposure. The field of view is 23.1 X 17.4 arc min. Second image is in false color was processed with Mira software
20K
Observer: Mike Sturm
Location: Cimarron Holstein Farm, Cushing, Oklahoma
Date: April 13, 1997 02:00-03:00 UT
50 mm f1.8 lens for two of the shots and a 135 mm f2.8 telephoto lens for the third, with exposure times of approximately 20-40 seconds. The film was Kodak Royal Gold 1000.
100K
Observer: Laura Wright
Location: Shaw Island, Lake Buchanon, Texas
Date: April 13, 1997 02:15 UT
Kodak Max Gold at 800 ASA with a Canon AEI on a tripod with a 50 mm lens and cable release. The shutter was open approximately 15 seconds.
97K
Observer: Till Credner
Location: Pik Terskol, Kaukasus, Russia
Date: April 13, 1997 02:30 UT
30 second exposure, Kodak Ektachrome 400 Elite II, f=55mm 1/1.8.
87K
Observer: David Etzold
Location: Upper Valley Suburbs, El Paso, Texas
Date: April 13, 1997 02:40 UT
Both photographs guided piggyback on a Celestron 8", with a Pentax Spotmatic and Kodak P400 film, scanned at 400dpi on EasyPhoto Drive:
Shot #1: 50mm lens, f1.4, 4 minute exposure
Shot #2: 300mm telephoto lens, f4, 4.5 minute exposure
23K
Observer: Dewey Vanderhoff
Location: Cody, Wyoming
Date: April 13, 1997 03:31 UT
15K
Observer: Michael Warner
Location: Tuscon, Arizona
Date: April 13, 1997 04:02 UT
CookBook245LDC CCD Camera, 24mmm F3.5 lens, 10 second exposure, Post-Processing included dark frame substraction and Gamma correction ( 0.5 ).
47K
Observer: Paul Cichocki
Location: Rhyolite, Nevada
Date: April 13, 1997 04:15-05:55 UT
Lightpainting used throughout all 4 images. Minolta X570 35 mm camera, Fuji Super G Plus 800 asa print film.
19K
Observer: Zoe Cichocki
Location: Rhyolite, Nevada
Date: April 13, 1997 05:40 UT
Time exposures were under 1 minute long, all taken with fuji 800 asa film, 35mm format, flashlight used for lighting.
24K
Observer: Paul Cichocki
Location: Las Vegas, Nevada
Date: April 13, 1997 05:40 UT
39K
Observer: Francois Colas
Location: Pic du Midi Observatory, France
Date: April 13, 1997 08:46-15:46 UT
This is the sum of 50 images of 0.4 second. Our goal is to observe a few "full rotations" of the comet to better understand the complex nucleus dynamic.
63K
Observer: Takashi Nakashima
Location: Kumanmoto Civil Astronomical Observatory, Japan
Date: April 13, 1997 19:19, 19:35 UT
1. 2 second exposure. Bitrun BT-11C, C-8, 2000mm.
2. 5 minute exposure. Bitrun BT-11C, C-8, 2000mm.
54K
Observer: Janusz Wiland
Location: Warka, Poland
Date: April 13, 1997 19:20 UT
Lens: FLEKTOGON 2.4/35. Film: FUJI 800 ASA. Exposure: 40 sec.
35K
Observer: Milan Kment
Location: Ceska Trebova, Czech Republic
Date: April 13, 1997 19:30 UT
Nikon 2.8/28mm lens, Kodak PCN 200 color negative film, exp. time 55 seconds.
21K
Observer: Luca Lorini
Location: Borgo San Lorenzo, Italy
Date: April 13, 1997 19:30 UT
Film: Scotchchrome 800-3200 (developed 1600ASA). Lens: Canon 28-135mm f4 (28mm). Exposure: 60 seconds.
58K
Observer: Masami Ohkuma
Location: Harajuku, Tokyo, Japan
Date: April 13, 1997 19:30 JST
Celestron C14 PrimeFocus, LynxxCCD, 5 sec exposure.
94K
Observer: Martin Mutti
Location: Stockerenweg 1, Wichtrach, Switzerland
Date: April 13, 1997 19:54-20:07 UT
58K
15K
7K
11K
21K
137K
60K
32K
37K
21K
26K
31K
18K
35K
35K
81K
Telescope: Starfire Refractor 102mm / 812mm
Guiding: Zeiss Telementor
CCD-Camera: Imaging:SBIG ST-7 HiRes mode
Guiding:SBIG ST-4
Size: 29' x 20'
IR stop + red, green, blue filter (CFW-8)
Integrations: red: 4 x 5 sec
green: 4 X 7.5 sec
blue: 4 X 20 sec
total: 130 sec
Image manipulation: dark substract
log + Prewitt Filter
Imaging software: CCDOPS36, PRISM
40K
Observer: Fred Stauffer
Location: Gondiswil, Switzerland
Date: April 13, 1997 20:00 UT
Camera: Olympus OM-2n. 35mm/f=3.5 lens. Kodak Royal Gold 1000. Exposure time 20 sec. The images were scanned by Remo Nyfeler from 20x30cm paper prints.
60K
Observer: Petr Pazour
Location: Observatory Vlasim, Czech Republic
Date: April 13, 1997 20:36:01, 20:10:00 UT
Image #1 camera : PRAKTICA lens : PENTACON 1.8/50 film : KODAK PROFESSIONAL 1600 exposure: 65 sec. Image #2 telescope: Newton 300/1580mm film : KODAK PROFESSIONAL 1600 exposure : 30 sec.
30K
Observer: Fred Wehner
Location: Hochstetten, Germany
Date: April 13, 1997 21:30 UT
Pentax 1:2.5 200mm on Kodak Tri-X-Pan and 15 sec exp. time.
39K
Observer: The Isaac Newton Group of Telescopes
Location: Roque de Los Muchachos Observatory, La Palma, Spain
Date: April 13, 1997 21:51 UT
300 second exposure through a narrow band filter centered at 555 nanometers. Field size is 10.42x10.87 degrees.
11K
Observers: Alberto Quijano Vodniza, Jose Alonso
Location: Mayaguez, Puerto Rico
Date: April 13, 1997 23:36:44 UT
Image was taken with a ST-6 CCD camera through a 5 inch, F10 reflector. 1.0 sec exposure. The field of view is 23.1 X 17.4 arc min.
22K
Observer: Joe Roberts
Location: Oakdale, Connecticut
Date: April 14, 1997
30 second fixed tripod exposure on Kodak Royal Gold 1000 film, 50mm F2.0 lens on a Pentax K1000 camera.
9K
Observer: Peter Barvoets
Location: Rensslaerville, New York
Date: April 14, 1997
45 sec. 50mm lens.
27K
Observers: Francois Colas, Cyril Birbaum, Eric Frappa, Laurent Jorda, Sylvain Champenois, Frank Boubault
Location: Pic du Midi Observatory, France
Date: April 1-14, 1997
These images are the result of the subtraction of a "blue image" by a "red image" showing up the blue CO+ emission band at 426 nm after removal of the dust continuum. Ion streamers are clearly visible almost anywhere in the coma. The Images were taken at the F/3 prime focus of the 55 cm telescope. The goal of these observations is to see the evolution of the ion streamers. Is is clearly visible that the comet was not very active on April 1st. The activity of the comet ion tail from April 12th to April 14th have to be related with the recent solar eruption.
6K
Observer: Mark Toups
Location: Amannsville Church
Date: April 14, 1997
180mm/f4.0 with Konica3200 hypered, 20sec.
48K
Observer: Vladimir Sevcik
Location: Edmonton, Alberta, Canada
Date: April 14, 1997
Canon EOS 650, 50 mm, film FUJI 400, 15-30 sec.
9K
Observers: Jean Lecacheux, Francois Colas
Location: Pic du Midi Observatory, France
Date: April 14, 1997 UT
The images were taken with a Gunn 6 filter on April 14th and April 15th. They show rapid change in the inner coma. The more interesting new evolution is the apparition a an helicoidal dust jet even at the opposite side of the sun.
36K
Observer: Larry Daniel
Location: Lewisville, North Carolina
Date: April 14, 1997
Both images were with AGFA 400 film with a 50 mm lens at 1.8 for 30 seconds.
89K
Observer: Daniel Henry
Location: Selkirk Shores State Park, Lake Ontario, New York
Date: April 14, 1997
1. Fuji G800 200mm @ 8min exposure. The camera was piggybacked on a meade 10" SCT telescoped and tracked.
2. Fuji G800 50mm ~20sec In the foreground is the meade 10" SCT telescope with the camera piggybacked on top for doing long time exposures.
83K
Observer: JJ Whittington
Location: Chavez Mountain, Arizona
Date: April 14, 1997
1 & 2. Camera: Pentax MX with 50mm f/1.7 lens. Film: Fuji Super G Plus 800. Exposure: 30 sec. at f/1.7.
3. Camera: Canon Elan II with wide angle zoom at about 35mm. Film: Fuji Super G Plus 800. Exposure: 30 secs at f/3.5.
4. Camera: Canon Elan II with 85mm f/1.8 lens. Film: Fuji Super G Plus 800. Exposure: approx. 30 sec at f/1.8.
6K
Observer: Tony Galvan
Location: Goleta, California
Date: April 14, 1997
Fujichrome 1600, 5 minutes, barndoor, Tamaron 28-200 zoom f/3/5 at 28mm.
16K
Observer: Khairul Nizam Omar
Location: Shah Alam, Malaysia
Date: April 14, 1997 00:25 UT
23K
Observer: H.T. Van Housen
Location: Burlington, Wisconsin
Date: April 14, 1997 01:41-02:49 UT
1. fl4.5 film Fuji1600 lens setting 130mm 10sec. used Canon ESO Rebel w/EF80-200mm lens.
2. fl2.0 Film Fuji800 setting 55mm 15sec.
3. fl 2.8 Film Fuji 1600 Lens setting 55mm @ 20sec.
24K
Observers: Michael Peck, George Krumins
Location: Champaign County, Illinois
Date: April 14, 1997 02:15 UT
1. Nikon FM2 piggybacked on guiding telescope; 180 f/2.8 Nikkor lens @ f/2.8. Approx. 4 min. exposure. Film: Ektachrome 100SW pushed 2 stops.
2. Taken at prime focus of 15cm f/5 Newtonian telescope. Approx 4 min exposure on Ektachrome 100SW pushed 2 stops.
58K
Observer: Geoff Simon
Location: Lake Oahe, Pierre, South Dakota
Date: April 14, 1997 02:15, 03:50 UT
1. 25 second exposure at f2.8 on Kodak Royal Gold 1000.
2. 30 seconds at f 2.8 on Kodak Royal Gold 1000.
73K
Observer: Tim Goering
Location: Jemez Reservoir & Bernalillo, New Mexico
Date: April 14, 1997 02:30, 03:00 UT
1. Nikon N90, 50 mm Nikkor lens, Fujicolor Super G ASA 800, f2, 30 second exposure.
2. Nikon N90, 50 mm Nikkor lens, Fujicolor ASA 800, f2.8, 30 second exposure.
51K
Observer: David McDavid
Location: Limber Observatory, Pipe Creek, Texas
Date: April 14, 1997 02:57
North is up, east is left, and the field of view is about 4 arcmin square. The image on the left is an ordinary intensity image. The image on the right is a polarization image (brightness proportional to the degree of linear polarization). These were derived from three pairs of 3.5 s exposures through polarizing filters oriented at 45, 90, and 135 degrees, together with a Cousins R filter, using a Photometrics CCD camera (Thomson 512 chip) at the f/12 Cassegrain focus of the 0.4 m telescope at Limber Observatory.
75K
Observer: Bernie Sanden
Location: Ragged Top Mountains, Arizona
Date: April 14, 1997 03:00 UT
Fuji Super G 800 for 45 seconds using 28mm lens at f2.
31K
Observer: Dave Schmahl
Location: Fallbrook, Northwest San Diego County, California
Date: April 14, 1997 04:30 UT
50mm lens at f2.8, 1000 Kodak Gold, 20 sec exposure, unguided.
22K
Observers: Salvador Sanchez, Antonio Garcia
Location: Observatorio Astronomico de Mallorca, Costitx, Spain
Date: April 14, 1997 19:30 UT
These images were obtained using the C14 (35cm diameter) telescope at f/11 and an ST-6 CCD camera. The top image was is a 14 sec R filter exposure. The bottom image is a combination of a 14 sec R filter and a 14 sec green filter image.
14K
Observers: Francesca Lucentini, Marco Paolo Pavese
Location: Genoa, Italy
Date: April 14, 1997 21:00-21:30 PM
1) FUJI 800 ASA camera NIKON F4 lens Nikon AFD 50mm F.2.8 TIME 5 sec. 2) SCOTCH 640T ASA camera NIKON F4 lens Nikon AFD 500mm F.4 TIME 15 sec. 3) SCOTCH 640T ASA camera NIKON F4 lens Nikon AFD 50mm F.4 TIME 6 sec.
32K
Observer: Jarle Aasland
Location: Stavanger, Norway
Date: April 14, 1997 21:07-21:33 UT
1. Moon and Hale-Bopp captured within the same frame. Unguided Nikon F4 with 28mm at f/2.0, 15 sec. exposure on Fujicolor 800. Lens has 74 degree field of view. This is a full-width scan of the original negative.
2. Unguided Nikon F4 with 28mm f/2.0 15 sec. exposure on Fujicolor 800.
3. Comments: Unguided Nikon F4 with 28mm f/2.0 15 sec. exposure on Fujicolor 800.
23K
Observer: The Isaac Newton Group of Telescopes
Location: Roque de Los Muchachos Observatory, La Palma, Spain
Date: April 14, 1997 21:35 UT
This is a 4s exposure taken without filters. Field size is 4.99x5.96 degrees.
Observer: Dr. Malte Scholz
Location: Tenerife, Canary Islands, Spain
Date: April 14, 1997, 22:00 UT
24mm wide angle F2.8, 40 s of exposure time on Fujicolor Super G 1600.
66K
Observer: Frans Frenken
Location: 's-Heer Arendskerke, The Netherlands
Date: April 14, 1997 23:20, 23:35 UT
15 second exposures.
33K
86K
18K
10K
57K
60K
30K
42K
59K
29K
26K
14K
28K
26K
31K
53K