30k 8K
Observer: Chris Lidman, Olivier Le Fevre
Location: European Southern Observatory, La Silla, Chile
Date: March 15, 1996 07:12 UT

This photo is a reproduction of a 5-second R-filtre CCD exposure taken with the EMMI Multimode Instrument on the ESO 3.5-m New Technology Telescope (NTT). The field shown is a small part of the original frame and measures 53 x 53 arcsec (198x198 pixels; each 0.27 arcseconds). North is up and East is to the left. At the time of the exposure, the comet was at a geocentric distance of 51.9 million km; this means that 1 arcsec = 250 km and 1 pixel = 68 km (projected) in this image.

71K 14K

48K 5K

36K 6K
Observer: Bob Hatfield
Location: Albuquerque, New Mexico
Date: March 15, 1996 07:31 UT, 09:13 UT

First image was taken through an F10 800mm lens with the st5 ccd at -29C. It is 12 x 90 sec 1080 second exposure. Second image was taken through a CG11 telescope at F6.3 at 09:13 UTC with ST5 ccd at -33C. It is 24 x20 sec 480 sec exposure.

201K 85K
Observers: Adolfo Cabral Porchas, Rosa Maria Escalante-Moreno, Horacio Pineda-Leon
Location: University of Sonora, Mexico
Date: March 15, 1996 12:02 UT, 09:24 UT

120 second and 180 second exposure.

126K 14K
Observer: Richard Berry
Location: ??
Date: March 15, 1996 10:52 UT - 11:51 UT

Cookbook 245 CCD, 6 inch f/5 Newtonian. Rank median processing.

344K 92K
Copyright 1996 Steven Lee Observer: Steven Lee
Location: Australia
Date: March 15, 1996 14:39-15:24 UT

The images were taken with a CB245 CCD camera and a 171mm focal length lens at f/1.9. The filters were photometric BVR. The image scale is approximately 10 arcseconds per pixel, and the image is oriented approximately North right, East up.

84K 44K

74K 21K

66K 17K
Observer: Masami Ohkuma
Location: Harajuku, Tokyo, Japan
Date: March 15, 1996 19:13 - 19:45 UT

Images taken with 100mm, 300mm + Lynxx. 60 second exposures.

42K 17K

77K 9K
Observers: Richard Colman, David Spiers
Location: Orange County Astronomers Observatory, Anza, California
Date: March 15, 1996

Comparison of two images, with and without rank order processing. Image taken with C-11 SCT F/10 (prime focus) with CB245. Processed with CB245 and MULTI245. Rank order processing. Composite of 9 25-second exposures.

33K 35K

72K 15K
Observers: Piergiorgio Cusinato, Alessandro Dimai, Davide Ghirardo, Giuseppe Menardi
Location: Col Druscie Observatory, Cortina d'Ampezzo, Italy
Date: March 16, 1996 04:05 UT

These are a mosaic of two images of 30 sec. (NUCLEUS) and four images of 30 sec. (tail) withnewton 0,5 m and CCD Hi Sis 22. The magnitude of the comet was 3,5. The comet was a beautiful naked eye object north of Alpha Librae. The second image is an enlargement of the nuclear region; its plasma tail is visible.

75K 29K

66K 28K

76K 54K
Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: March 16, 1996 04:05 UT

Original image was obtained with a 135mm (f/1.8) telephoto lens and a SBIG ST6 CCD camera, piggy-back mounted on a 10" LX200. 10 images of 30 seconds each.

96K 27K
Observer: Steve Barnes
Location: Dorset, Ontario, Canada
Date: March 16, 1996 07:00 UT

This picture was taken with a 50 mm f/1.7 lens and Kodak Extapress 1600 pushed 1 stop. The exposure was about 2 minutes piggyback on a C8. The picture was scanned and then processed in Photostyler.

33K 35K

72K 15K
Observers: Dan Bruton, Thomas Pollock, Moon-Ho Park
Location: Texas A&M Observatory, College Station, Texas
Date: March 16, 1996 08:55 UT, 07:25 UT, 09:21 UT

Images taken with 8" Schmidt Camera, ASA 200 Film, 5 minute exposures.

38k 34K
Copyright John E Cordiale 1996
Observer: John Cordiale
Location: ???
Date: March 16, 1996 09:00 UT

CCD image using a FC-65 500mm Takahashi Flourite refractor and a ST4 CCD camera.

26K 6K
Observer: Joe Eiers
Location: Sacramento, California
Date: March 16, 1996 10:45 UT

Sketch drawn using a 10" F/6 Reflector, 9mm Nagler - naked eye limiting Magnitude= 3.8.

36K 8K
Observer: David McDavid
Location: Limber Observatory, Pipe Creek, Texas
Date: March 16, 1996 11:09 UT

North is up, east is left, and the field of view is about 30 arcmin square. This false-color image is a composite of six 100-s exposures with a Photometrics CCD camera (Thomson 512 CCD) mounted on a 4-inch f/10 Meade Schmidt-Cassegrain telescope. This telescope is attached to the 0.4-m telescope.

184K 121K
Observer: Jim Eiselt
Location: Fremont Peak State Park, California
Date: March 16, 1996 20:30 UT

135mm @ f/2.3 for 8 minutes (guided) using Kodak Royal Gold 400 film. Negative was scanned and enhanced in Adobe Photoshop.

26K 7K
Observer: Gary Kronk
Location: St. Louis, Missouri
Date: March 16, 1996

A 35mm photo exposed by Kronk with a 50mm lens and 400 ISO film was also obtained on this date and gives a view not much different than a naked-eye view (photo).

213K 47K

24K 4K
Observer: Richard Wainscoat
Location: University of Hawaii
Date: March 16, 1996 UT

In all images, north is at the top, and east is at the left. R-band image of Comet Hyakutake from the Canada-France-Hawaii Telescope using a 8192x8192 CCD camera, mounted at the prime focus. The field-of-view is approximately 0.5 degrees, with pixels of 0.206 arcsec. The image is presented here binned by a factor of 16. Exposure time was 5 seconds. Second image is the central 2x2 arcminute region of the full image shown above. It shows greater detail in the nuclear region, and shows the tail extending into the nucleus. This image is binned by a factor of 2; each pixel shown is 0.41 arcseconds. The seeing was approximately 0.7 arcseconds.

72K 51K

36K 68K
Observer: Ismael Civera Alcaniz
Location: Villatoya (Albacete), Spain
Date: March 17, 1996 01:00 UT

Image was taken with a 135mm F:1.8 , Kodakcolor 100 ASA and 10 minutes of exposure.

226K 38K
Observer: David Strange
Location: United Kingdom
Date: March 17, 1996 01:01 UT

This CCD image was taken with a 4x80s exposure using an SX camera and a 135mm, f/2.8 lens.

124K 49K

60K 22K
Observers: Bill Whiddon, Paul Harris, Jim Tobin, Alan Gayda
Location: Red Rock Canyon, California
Date: March 17, 1996 01:29 UT, 02:08 UT

Photos taken with 8 inch f/1.5 schmidt camera. Five minute exposures on Ektachrome P1600.

25K 15K
Observer: Sylvian Juteau
Location: Quebec, Canada
Date: March 17, 1996 06:00 UT

Lentille 210mm F5. Temps de pose 20 minutes. Film: Fujicolor 800 Super G Plus.

57k 50K
Observers: Lee Shelp, Jim Eggleston, Al Zumbuhl, Jay Edwards
Location: Vestal, New York
Date: March 17, 1996 06:37 UT

This file is a mosaic of four images each an eight minute exposure using an ST-6 CCD at the prime focus of an 80MM f/3.75 Lumicon refractor.

64k 6K
Observer: Chris Sheehan
Location: Rochester, New Hampshire
Date: March 17, 1996 08:20 UT

Image taken with an ST-5 on a Meade lx200 10" f10. Prime focus 25 second exposure at -10.0 degrees centigrade.

196K 76K
Observers: Fernando Avila, Carmen Expriella, Adolfo Cabral, Adalberto Ayala, Liliana Valenzuela
Location: University of Sonora, Mexico
Date: March 17, 1996 09:41 UT

Image taken with CCD SBIG XT-4X + 70mm. 300 second exposure.

141K 42K

148K 52K
Observer: Martin George
Location: Underwood, Tasmania, Australia
Date: March 17, 1996 12:05 UT, 13:24 UT

First image: 40-minute exposure made using a 200mm f/4 lens. Second image: 13-minute exposure made using a 50mm f/2.8 lens.

99K 48K
Observer: Masami Ohkuma
Location: Harajuku, Tokyo, Japan
Date: March 17, 1996 17:38 UT

Images taken with 100mm, 300mm + Lynxx. 30 second exposure.

16K 7K

11K 6K

21K 21K
Observer: Joe Eiers
Location: Sacramento, California
Date: March 17, 1996 20:45 UT, 21:55 UT, 22:15 UT

Sketches from naked eye viewing, limiting Magnitude = 6.0.

11K 6K

29K 12K
Observers: Jesse Anderson, Bob Aslanian, Ed Frederick
Location: New England Science Center, Worcester, Massachussetts
Date: March 17, 1996

Image obtained with a ST-6 CCD camera. 10 and 5 second exposures through a 7" Meade Refractor.

73K 15K

102K 26K
Observer: Brian Halbrook
Location: Michigan
Date: March 17, 1996

First image: this closeup image of Hyakutake was taken with a 135mm telephoto lens mounted atop a telescope and guided on the comet for a 6-minute exposure. This second image of Comet Hyakutake 1996B2 was captured as it rose above a tree-scaped horizon from just minutes away from Marquette. 25-second exposure with 50mm lens on tripod ISO 1000 film.

65K 62K
Observer: Richard Navarrete
Location: Fremont Peak, California
Date: March 17, 1996

50mm lens on hypered Tech Pan. 10 minute exposure.

39K 10K

53K 11K
Observer: Gilbert St-Onge
Location: Quebec, Canada
Date: March 17-18, 1996

51K 16K
Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: March 18, 1996 01:38 UT

Original image was obtained with a 135mm (f/1.8) telephoto lens and a SBIG ST6 CCD camera, piggy-back mounted on a 10" LX200. 3 images of 30 seconds each.

38K 26K
Observers: Perico Martorell, Josu Redin
Location: Pamplona, Spain
Date: March 18, 1996 03:30 UT

The image was obtained using a photographic camera with a 300mm teleobjective f/5.6. The film used (print) was Fuji G-400. Exposure time: 20 minutes.

253k 47K

154k 25K

379k 62K
Observer: David Lane
Location: St. Margaret's Bay, Nova Scotia
Date: March 18, 1996 04:00-05:00 UT

First image: taken with Tele-Vue Genesis (4" f/5) for 13 minutes using Kodak Royal Gold 1000 print film. Second image: taken with Tele-Vue Genesis (4" f/5) for 13 minutes.

Third image: taken with 135mm f4 telephoto lens for 16 minutes using Kodak RoyalGold 1000 print film.

88K 13K

146K 28K
Observer: David Hanon
Location: Ringgold, Georgia
Date: March 18, 1996 04:25 UT, 03:00 UT

First image (3) 5 minute exposures averaged. They were taken with a 300mm f/2.8 lens and ST-8 ccd camera. The mean time of the exposures was 04:25 UT. The second image is a single 10 second exposure showing the comet rising above tree tops on a distant hill. The time of the exposure was 03:00 UT. Same equipment as the first image.

24K 17K

36K 13K

62K 67K
Observer: Sylvian Juteau
Location: Quebec, Canada
Date: March 18, 1996 06:00 UT

J'ai pris une photographie avec une lentille de 105 mm avec un doubleur de focale (2X). Le temps de pose est de 20 minutes guidi sur la comhte avec une longueur focale effective de F5.

137K 37K
Observers: Javier Pompa-Alvarez, Adolfo Cabral-Porchas
Location: University of Sonora, Mexico
Date: March 18, 1996 07:33 UT

Image taken with CCD SBIG XT-4X and 6cm refractor.

280K 28K
Observer: Richard Berry
Location: ??
Date: March 18, 1996 10:06 UT - 12:50 UT

Cookbook 245 CCD, 6 inch f/5 Newtonian. Rank median processing.

139K 59K
Observer: Martin George
Location: Underwood, Tasmania, Australia
Date: March 18, 1996 14:00 UT

An image taken with a 50mm f/2.8 lens. Exposed for 13 minutes. Note the upward curve in the tail!

44k 3K
Observer: Bill Almond
Location: Victoria, Canada
Date: March 18, 1996

Image taken with a CCD Camera on a 10" telescope through thick haze (for experts: two magnitudes of extinction).

86K 20K

103K 20K

71K 8K
Copyright 1996 Jack Newton
Observer: Jack Newton
Location: Canada
Date: March 18, 1996

First Image: 6 min. exposure 300 mm f2.8

Second Image: 60 sec. 300mm f2.8 tri colour March 18 about 1am.

Third Image: 30 sec.tri colour 25" f/5 telescope Meade Pictor 1616 ccd camera.

71K 14K

48K 5K

36K 6K

48K 5K

36K 6K
Observer: Bob Hatfield
Location: Albuquerque & Santa Fe, New Mexico
Date: March 18-19 UT

First image is a 10 sec exp through 800mm f10 lens with st5 ccd at -30C. It is interesting only becaus of meteor or perhaps cosmic ray streak on ccd. The rest of the images were obtained at a dark site near Santa Fe at about 8500 feet on 3-19. The st5 was at -38C for all exposures, and all have been flat fielded.

27K 23K
Observers: Laurent Jorda, Jean Lecacheux
Location: Pic du Midi Observatory, France
Date: March 18-19, 1996

These six images are taken with a HiSis 44 camera build with a Kodak KAF 1600 CCD device. We used the 105 cm telescope with Nasmyth-Cassegrain focus (F/17) with a large pass band filter center at 700 nm (fwhm = 400 nm). As we used 30% of the comet light to guide directly on the nucleus, the time exposure of each picture could reach 300 seconds without any guiding defects. The seeing was good (0.9 arcsec) for these 5 minutes exposures, but more important is the fact that we observed during a 6 hours run. North is up and west is on the right. We have substracted a radial profile from each image to enhance the asymmetric details. The ion tail is clearly visible at PA = 275 deg. Two curved jets are present on most of the frames.

28K 7K
Observer: Gary Kronk
Location: St. Louis, Missouri
Date: March 18, 1996

A 35mm photo exposed by Kronk on March 18 with a 50mm lens and 400 ISO film was also obtained on this date and gives a view not much different than a naked-eye view (although stars and comet are a bit trailed).

166K 62K

199K 47K

119K 51K
Observer: Herman Mikuz
Location: Crni Vrh Observatory, Slovenia
Date: March 19, 1996 02:07 UT, 02:39 UT

Latest CCD image of comet Hyakutake, recorded in the light of singly-ionized water ions was taken with the 4.0/250mm lens and narrow-band H2O+ filter, centered at 620nm (FWHM=10nm). Exposure time was 5 minutes. The image FOV (field of view) is 163'x107'. Third image is aCCD image with the 4.0/250mm lens and dust continuum filter, centered at 647nm (FWHM=10nm). Exposure time was 3 minutes. The image FOV is 163'x87'.

323K 78K
Observers: Adolfo Cabral-Porchas, Rosa Maria Escalante, Javier Pompa-Alvarez,Horacio Pineda
Location: University of Sonora, Mexico
Date: March 19, 1996 06:58-07:34 UT

Images taken with CCD SBIG XT-4X and 6cm refractor. Processed with MIRA.

142K 35K

55K 14K

45K 32K

72K 20K
Observer: Sylvian Juteau
Location: Quebec, Canada
Date: March 19, 1996 08:00-09:00 UT

Lentille 105mm F 5.6. Temps de pose 10 minutes. Film: Fujicolor 800 Super G Plus.

50k 3K
Observer: Chris Sheehan
Location: Rochester, New Hampshire
Date: March 19, 1996 09:21 UT

Image taken with an ST-5 on a Meade lx200 10" f10. Prime focus 60 second exposure at -15.0 degrees centigrade.

67k 57K
Observers: Kevin Healy, Jim Wren
Location: Estcorn Campus Observatory, Socorro, New Mexico
Date: March 19, 1996 09:30 UT

Image shot piggy-back with a 70 mm lens on 35mm ASA 400 film. Exposure time of 10 minutes.

168K 21K
Observer: John Farrell
Location: Los Alamos, New Mexico
Date: March 19, 1996 10:26 UT

300 second exposure with 36 cm SCT at f/7 and an Axiom Research AX-2 CCD camera with the pixels binned 2x2. Image scale is 1.5 arcsec/pixel. The field of view is 12.8 x 12.8 arc minutes.

155K 34K
Observer: Martin George
Location: Underwood, Tasmania, Australia
Date: March 19, 1996 14:00 UT

Image taken with a 200mm f/3.5 lens. Tracking on the comet during the 40-minute exposure shows up by the trailed images of the background stars.

30k 8K

30k 8K

30k 8K

30k 8K
Observer: Olivier Hainaut, Richard West, Manuel Pizarro, Vicente Reyes
Location: European Southern Observatory, La Silla, Chile
Date: March 19, 1996

The most recent ESO observations of bright Comet Hyakutake have shown rapid changes in the innermost coma, within a few hundred kilometres from the cometary nucleus. This result has only become possible because of the unusual combination of a bright comet being near the Earth, together with the excellent imaging quality of the ESO 3.5-metre New Technology Telescope (NTT). The images shown here are based on a unique series of fourty-four 2-sec exposures, obtained under excellent conditions (seeing 0.7 - 0.8 arcsec).

36k 10K

30k 9K
Observers: A. Simon, C. Garasi, N. Miller
Location: Clyde Tombaugh Observatory, New Mexico Statu University, New Mexico
Date: March 19, 1996

First image: Total exposure 70 s (median combine of 7 10s exposures). Second image: same image with logarithmic scaling applied to make the tail more apparent.