: A prize awarded Internet based Hyakutake Parallax
project.
April 13, 1996 : Tail
structure of Comet Hyakutake develops further. This picture (apr13red.gif) was
taken using 200 second unguided exposure, red R filter, a 5'' APO Meade, focal
length reduced to approx 0,60 Meters, ST6 CCD. Telescope was mounted piggyback
on our 16'' SCT, periodic error control reprogrammed by user. Photographers:
Lene S. H. Duus, JCornelius Olsen, Uffe A. Hansen, Michael K. Nielsen, Iver
Tidemand, Jens Christian Clausen, Mogens Winther at Amtsgymnasiet i S𮤥rborg.
April 13, 1996 : This
picture (apr13col.gif) has the same data as the picture above except that we
used an RGB color combination of 3 exposures in red, green and blue.
April 13, 1996 : Picture
(m1011304.gif) of Messier 101, Pinwheel Galaxy, April 13 1996. Spanning nearly
half a degree in the sky, equivalent to the size of a Full Moon, this galaxy
is one of the largest, brightest galaxies known. Distance 20 million Light
Years, diameter 200000 Ly, twice as much as our own Milkyway. 12 x 120 Sec.
student CCD Exposure, Amtsgymnasiet i S𮤥rborg.
April 11, 1996 : Comet
Hyakutake is regaining its tail. On this moonless night (april11.gif) the
comet tail was visually estimated as having more than 20 degrees length. 120
seconds unguided CCD, red filter, 5'' APO refractor, P.B. mounted on a
reprogrammed 16'' SCT.
April 5, 1996 : Comet
Hyakutake. On this negative image (april05.gif) a clear split is visible. This
picture and the one below were captured by Soren Verner, Kirsten Brodsted and
Jens Winther at Amtsgymnasiet i S𮤥rborg at April 05 192103 UT, using 5" Meade
APO P.B. on 16 inch refractor and ST6 CCD, 40 sec exposure. Vertical image
size is 1200 arcseconds.
April 4, 1996 The Come:t
Hyakutake is running towards the Sun. On this picture (april04.gif) the tail
shows additional structures. Exposure data and equipments is as above.
April 4, 1996 : This
picture (hyspeed2.gif) shows the comet coma, before and during the Lunar
Eclipse. Picture exposure time and display conditions were kept constant, the
effect of a darkening sky is easily visible. As a result of the changing
background, the two comet nucleus appear to be of different size. As part of
their contribution to the National Youth for Science competition, our students
will estimate Gaussian coma sizes, both angular and real FWHM (km). Already
now, we see that even though the comet distance has increased a factor 3
compared to March 26 (hyaspeed.gif), the angular size is nearly unchanged.
This means the comasize is increasing dramatically, probably due the
decreasing distance to the Sun. The decreasing distance implies a nearly
twicefold increase in Solar radiation Intensity when compared to March 26. In
addition, comparison between these images show the angular speed has decreased
dramatically, now the comet takes much longer time to move the same angle as
during March 26.
April 4, 1996 : The comet
is still there, and a large tail of several degrees was easily seen during the
eclipse totality. This picture (comw0403.gif) is taken shortly before the
eclipse. Light pollution was a problem, both due to the full moon and due to
the city of S𮤥rborg. Wide field CCD, 9x6 Deg.
April 2, 1996 : This
document (parall.htm) contains preliminary student-results on the
Portuguese-Danish-Parallax.
Information
Astronomy activities : A
document telling the history behind the astronomy activities at Amtsgymnasiet
i S𮤥rborg.
Astronomi-aktiviteter
(Danish only): Her kan du l泥 lidt om historien bag astronomi-aktiviteterne
p堁mtsgymnasiet i S𮤥rborg.
