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Comet Hale-Bopp Images - August 1995

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Observers: Anne-Marie Lagrange, Jean Luc Beuzit, Patrice Bouchet
Location: European Southern Observatory, La Silla, Chile
Date: August 16-17, 1995

This images shows the innermost part of the comet's head. It is reproduced from an image that was obtained with the ADONIS adaptive optics instrument at the 3.6-metre telescope on La Silla. It is a composite of three 1-minute exposures through an infrared K-filtre centered at wavelength 2.2 microns. The field measures 13 x 13 arcseconds. The pixel size is 0.05 arcseconds. North is up and east is to the left.


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Observers: Sanjay Limaye, Chris Greiveldinger
Location: Kitt Peak, Arizona
Date: August 17, 1995

This image of Comet Hale Bopp was obtained from the newly commissioned WIYN telescope at Kitt Peak, Arizona. A Harris red filter was used in this 60 second exposure. The image is false color enhanced.


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Observers: M. Okyudo, M. Sakamoto
Location: Misato Observatory, Japan
Date: August 18, 1995


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Observers: Guido Pizarro, Patrice Bouchet, Jean Luc Beuzit
Location: La Silla, Chile
Date: August 18.1, 1995

These images are based on a wide-field photographic plate obtained with the 1-metre Schmidt telescope at the La Silla observatory. The exposure lasted 30 minutes and was made on sensitized Kodak IIIa-F emulsion through a red RG630 filtre. This combination registers light in the 6300 - 7000 A (630 - 700 nm) spectral region and is well suited to show the sunlight reflected from the dust particles in the coma of Comet Hale-Bopp. Each of the three photos covers the same sky area of approx. 25 x 10 arcminutes; the scale is indicated on Photo 24B/95 by a 5 arcminute bar. North is up and Eas t is to the left. At the time of this exposure, the comet was located in a very rich ste llar field in the constellation of Sagittarius (R.A. = 18 hrs 27.7 min; Decl. = -31 deg 18 min ; equinox 2000.0), and less than 10 degrees from the direction of the galactic cen tre. The distances from the Earth and the Sun were 930 and 1040 million kilometres, respectively.


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Observer: Ralph Pass
Location: Andover, Massachussetts
Date: August 18, 1995

A Cookbook 245 CCD was used without the low noise modification. A Meade 8" f/6.3 LX200 was used for the exposure with no guiding during the exposures. The exposures were four minutes each. For each image, a dark field was subtracted and a flat correction applied. The images were then median filtered and then the pixels were made square. A log enhancement was applied to each of the images.


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Observer: Paul Francis
Location: Siding Spring Observatory, Australia
Date: August 18, 1995 11:00 UT

A median combined image of 21 images using the 1m telescope at Siding Spring. The original images were three minute integrations in the V-band. The pixel size is 0.61".


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Observer: David Hanon
Location: Ringgold, Georgia
Date: August 19, 1995

Grayscale image taken with ST6 7" F/9.


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Observer: Richard Berry
Location: Pine Mountain Observatory, Oregon
Date: August 20, 7:03 UT

Image taken at focus of the 32 inch f/3 refelctor at Pine Mtn Observatory (U of Oregon), integration time 60 seconds. Sharpest of the 23 images taken. The CCD is a Cookbook 245 LDC (low-dark-current modified).


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Observers: Timothy Wachs, Matthew Wachs
Location: Ithaca, New York
Date: August 21, 1995

This is a summed combination of 9 thirty-second images, taken with a CCD Camera Cookbook CB245 camera (without the LDC modification) on a homemade 6-inch f/8.4 Newtonian reflector. Comet Hale-Bopp is the nebulous "star" near the top-left of the image.


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Observers: Rodrigo Campos, Gabriel Hickel, Marildo Pereira
Location: Pico dos Dias Observatory, Brazil
Date: August 23, 1995

Image taken with 24 inches Boller & Chivens Telescope, Exposure time: 5min, Filter: R.


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Observer: Norio Namiki
Location: Mt. Fuji, Japan
Date: August 24, 1995 12:16 UT

date of obs:  Aug 24 1995 12:16 UT 12min exp.
telescope:    hypabolic astrograph 160-mm f/3.3
              (Takahashi epsilon 160)
equatorial:   Takahashi 90S, auto guiding
film holder:  Mamiya RB67
film:         Fujicolor SuperG ACE400(120)
developer:    HAC3200(Kenko)

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Observers: Alan Fitzsimmons, Martin Cartwright
Location: La Palma, Spain
Date: August 25, 1995

An image using the 1m Jacobus Kapteyn Telescope on La Palma using the cassegrain CCD camera plus R-band filter. The image is centered on the nucleus and is 19 arcsec by 19 arcsec. The spiral jet of material appears to extend over 5 arcsec from the nucleus, or > 25,000 km at the distance of the comet.


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Observer: Pedro Re
Location: Portugal
Date: August 1995 - June 1996

All images were obtained from central Portugal with a C14 and HISIS22 CCD Camera.


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Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: August 26, 1995 UT

30 images of 120 seconds each (addition of 3 series of 10 images in "track-and-accumulate" mode, centered in the comet's nucleus). Hazy night. ST6 camera. The same image has been processed in two different ways (negative and log).


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Observers: H. Fukushima
Location: Japan
Date: August 26, 1995

Image taken with 50 cm Cassegrain (F12) with Astromed 3200 series CCD Camera, 2 mintes with R-Band Filter (in twilight through thin clouds)


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Observer: Diego Meozzi
Location: Trevignano Romano, Italy
Dates: August 27, 1995 21:12 UT, August 31 20:33 UT

Images taken with a Celestron 8" SCT working at f/6.3 (telecompressor). First image exposure was 4 x 120 sec. (4 co-added images, then smoothed and interpolated) with a SBIG ST-4 CCD camera. Second image exposure was 5 x 120 sec. (5 co-added images, then smoothed and interpolated) with a SBIG ST-4 CCD camera.


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Observer: Jun Chen
Location: University of Hawaii
Date: August 28, 1995 UT

R-band (red) image University of Hawaii's 2.2-meter telescope. The field shown is 1.9 x 1.9 arcmin. A distinct "spiral arm" is seen coming from the nucleus. The exposure time was 300 seconds.


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Observers: Fulvio Romano, Roberto Barcellona
Location: Cuneo Observatory, Italy
Date: August 28, 1995 21:00 UT

20 second exposure taken with a C/11 - F/6.3.


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Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: August 28, 1995 UT

30 images of 120 seconds each in "track-and-accumulate" mode (centered in the comet's nucleus). Hazy night. ST6 camera.


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Observers: Mark Kidger
Location: Teide Observatory, Canary Islands, Spain
Date: August 28, 1995

This image was taken with the IAC80 Telescope (0.82m) pertaining to the Instituto de Astrofisica de Canarias in the Canary Islands, Spain.


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Observers: Rodrigo Campos
Location: Pico dos Dias Observatory, Brazil
Date: August 30, 1995

Image taken with 24 inches Boller & Chivens Telescope, Exposure time: 5min, Filter: R.


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Observer: Ralph Pass
Location: Andover, Massachussetts
Date: August 31, 1995 01:15 UT

This is a merge of three four-minute exposures. Dark frames were subtracted and flat fields applied to each image prior to merging. A Cookbook 245 camera was used with a Meade LX200 8" F/6.3. There was no guiding during any of the exposures


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Observers: Emilio Molinari, Hans Kaeufl
Location: La Silla, Chile
Date: August 31, 1995

This false-colour image of the large jet now observed in bright comet Hale-Bopp is a computer-enhanced version of a near-IR CCD-frame. It was obtained with the multi-mode DFOSC instrument at the Danish 1.5-m telescope on La Silla. On this photo, North is up and East is to the left. The exposure lasted 5 minutes and was made through a gunn-i filter, recording the reflected sunlight from the dusty coma of the comet at a wavelength of about 9000 A (900 nm). The image shows that the jet emerges at a distance of about 3 arcsec North-West from the centre, curves towards North and then abruptly bends 90 deg towards North-East.


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Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: August 31, 1995 20:45 UT

Image was produced adding the 8 frames together. The frames were shifted in order to "track" the comet's nucleus. Each frame is a series of 7 images of 120 sec. each in "track-and-accumulate" mode, obtained in 2h period begining at 20h45m UT 08/31/95.


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Observers: Mats Dahlgren, Felix Lahulla
Location: European Southern Observatory, La Silla, Chile
Date: August 1 - September 1, 1995 UT

This photo is a false-colour reproduction of the central part of a CCD frame taken with the Dutch 0.90-metre telescope at the ESO La Silla observatory in Chile. The pixel size is 0.44 arcsec and the field measures approx. 1.2 x 1.2 arcmin. North is up and East is to the left. It is a 2-min exposure, taken through a red filtre. It clearly shows the now famous jet extending from the centre towards upper right (North-West).


If you would like to submit a new image to this home page, contact:
Ron Baalke
ron@jpl.nasa.gov

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