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Comet Hale-Bopp Images - August 1995


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Observer: Ralph Pass
Location: Andover, Massachussets
Dates: July 31, 1995 02:40 UT, August 1, 1995 02:10 UT

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: Dave Buckley
Location: South Africa Astronomical Observatory
Date: August 1, 1995

Image taken with the 1.0-m telescope at SAAO Sutherland with a 200s exposure through an I filter. North is at the top and East to the left.

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Observer: Dave Harvey
Location: Steward Observatory, Tuscon, Arizona
Date: August 2, 1995 06:34 UT

This image was obtained from Kitt Peak using the Steward Observatory 90 Inch Telescope. A Loral 2kx2k CCD was exposed for 30 seconds while the telescope tracked the comet. Field of view is approximately 4 x 4 arcminutes.

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Observer: Neil Trentham
Location: University of Hawaii
Date: August 2, 1995 UT

R-band (red) image (on the left) University of Hawaii's 2.2-meter telescope. The field shown is 7 x 7 arcmin; exposure time was 60 seconds. In a deep stretch of this same image (on the right), the comet is seen to extend almost to the edge of the CCD field.

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Observer: Neil Trentham
Location: University of Hawaii
Date: August 2, 1995 UT

Color image using the University of Hawaii's 2.2-meter telescope. The field is the same as shown in the R-band image above, and the image was carefully color calibrated so that a solar type star would appear white. In this image, the comet is not a colorful object - its coma has a color similar to (but slightly redder than) the color of the Sun. Since the comet moved slightly between the red, green, and blue exposures which make up this image, the background stars do not register exactly.

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Observer: Arto Oksanen
Location: Nordic Optical Telescope, Canary Islands, Spain
Date: August 2, 1995 23:50 UT

CCD image taken with the 2.5m Nordic Optical Telescope. Image on left is an unprocessed raw image with false colors. Image on the right is the same in grays.

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Observers: Robin Catchpole, Peters Andrews
Location: Royal Greenwich Observatory, United Kingdom
Date: August 3, 1995 01:35 - 02:00 UT

The comet was imaged by the JKT using exposures of 250, 250 and 600 seconds, with V, R and B filters. The comet moved significantly during the course of the exposures. The three images obtained have therefore been combined in two ways. In the first the comet is exactly registered causing the stars to blur and in the second image the stars are registered causing the comet to blur. The field of view is 3.5 arc mins on the side which, at the distance of the comet of 560 million miles, corresponds to 575 000 miles, about the diameter of the moon's orbit about the earth

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Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: August 3, 1995

32 images of 60 seconds each in "track-and-accumulate" mode taken with Meade LX100 10" telescope. Image taken from an apartment roof-top and processed with CCDOPS and Abobe Photoshop.

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Observer: John Farrell
Location: Los Alamos, New Mexico
Date: August 4, 1995 06:13 UT

Time is the median of four 60 second exposures with a C-14 at f/7 and an AX-2 CCD camera, which was binned 3x3 because of poor seeing. Observation from Los Alamos, NM, lat 35d 49', long 106d 11' W, elevation 6320 feet.

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Observer: Anders Erikson
Location: European Southern Observatory, La Silla, Chile
Date: August 4, 1995

Image taken with the 60cm Bochum telescope at ESO (La Silla, Chile) and the DLR CCD camera system with a 1024x1024 Tektronics chip.

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Observers: Chris Lidman, Patrice Bouchet
Location: European Southern Observatory, La Silla, Chile
Date: August 5, 1995

This false-color infrared (1.5-micron) image was obtained with the 2.2-meter telescope on La Silla, Chile. The field is 2.2 arcminutes square. Courtesy the European Southern Observatory.

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Copyright 1995 Australian National University
Observers: G. Garradd, D. Asher, R. McNaught, D. Steel
Location: Siding Spring Observatory, Australia
Date: August 6, 1995 UT

The tricolour image was made using the ANU 1.0m telescope at Siding Spring Observatory. The yellow colour of the coma on the North side of the comet indicates it is composed of dust and is shining by reflected sunlight. North is to the right.

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Observers: Adam Block, Carl Hergenrother
Location: Steward Observatory, Arizona
Date: August 10.25, 1995 UT

Image taken with the 21" University of Arizona, Steward Observatory Campus scope and ST6 CCD camera. Image taken on Aug 10.25,1995 UT when the comet was 7.00 au from the sun and 6.20 au from the earth.

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Observer: Charles Morris
Location: Mount Wilson Observatory, California
Date: August 11.21, 1995 UT

This CCD image was taken using the TIE 60cm f/3.5 telescope and a ST-6 CCD. Exposure was 40 seconds and the image is unfiltered and has been flat fielded.

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Observers: M. Kidger, J. Gonzalez Perez
Location: Teide Observatory, Canary Islands, Spain
Date: August 14, 1995

R filter exposure, 2000 second exposure. Image taken with the IAC80 Telescope (0.82m).

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Observers: M. Kidger, J. Gonzalez Perez
Location: Teide Observatory, Canary Islands, Spain
Date: August 14, 1995

Sum of 5 images taken in the R filter. Total time exposure: 2000 seconds.

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Observers: M. Kidger, J. Gonzalez Perez
Location: Teide Observatory, Canary Islands, Spain
Date: August 15, 1995

Four images taken with the IAC80 Telescope (0.82m).

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Observers: Kazuyuki Ito
Location: Sengamine Observatory, Hyogo, Japan
Date: August 15, 1995 1134 UT

30 second exposure taken with a 0.20-m f/6.0 Reflector.

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Ron Baalke