Melbourne's Astronomy Central
Colour images of C/1996 B2 (Hyakutake)
A colour image of C/1996 B2 (Hyakutake) taken by
(University of Melbourne) and
(University of Melbourne) using the 40 inch telescope at Siding Spring.
The image was taken on the morning of Sunday 25 Feb 1996 (UT 24.77 Feb 96)
after a night imaging for slow moving objects (comets/asteroids) beyond
20 AU. The ion tail is clearly visible, stretching towards the top left of
the image. The image is 28 arcmin X 17 arcmin and is a combination of
a 60 second R band exposure, an 80 second V band exposure and a 100
second B band exposure. The magnitudes of the comet are
approximately R=7.6, V=6.9 and B=7.5.
The image has appeared on Swedish Television Channel Two news
("Rapport") and has been shown on Japan's NHK TV station.
Several of the following images have been published in
Asahi Shimbun newspaper(Nov 96),
The Australian newspaper (21/3/96),
Sky and Telescope
(May 96) and Revista UNIVERSO Astronomia y Astronautica. Associated Press
distributed the image world wide with The Age article.
It has also been used for displays at the Hayden Planetarium
(American Museum of Natural History)
and the Maynard F. Jordan Planetarium (University of Maine).
A larger GIF (394k) of the above image is available.
A larger jpg (147k) of the above image is available.
A 1130k (24 bit colour) TIFF version of the large colour image on this
A 407k image (produced by subtracting a median fit to the original image)
with detail in the head and tail. There could
be evidence of a disconnection event in this image but it could be
an artifact of the median filter. As seen in the
A 170k image (produced by subtracting a guassian fit to a median fit of
the original image) showing structure in the tail. The
dark ring is an artifact of the gaussian fit used. As seen in
the Age (21/3/96).
The 60 second R band image is available(347k).
A contour plot of the 60 second R band image.
A colour image with a different brightness setting(176k).
R band images of C/1996 B2 (Hyakutake)
A false colour image (in R band) of C/1996 B2 (Hyakutake) taken
(University of Melbourne) and
Chris Fluke(University of
using the 40 inch telescope at Siding Spring on the morning of Tuesday
20th Feb 1996 after a night searching fields for Kuiper belt objects.
The field of view is 24 arcmin X 14 arcmin and the
integration time was 200 seconds. The comet's magnitude is approximately
R=7.5. The trail at the bottom left of the
image is a satellite. Click here for a full size (137K) image,
here for a 137k image with a different
colour map or
e for a 157k image with a log scale colour map. If you want more details abo
ut this image please email
Michael Brown email@example.com(remove .po for a valid address).
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For queries about Melbourne's Astronomy Central contact
Chris Fluke: firstname.lastname@example.org
created on: 22 September, 1997. Last updated: 22 September, 1997.
Michael Brown, mbrown@NOSPAM.physics.unimelb.edu.au
Authorised by R.Webster