The Galaxies in Virgo and
Coma Berenices are found in an area
of the sky well away from the stars and gas
cloud "pollution" of our own Milky Way, so I
decided to see just how many galaxies I could
pick up with a relatively small refractor
Borg 100mm) working at F4. It turned out to
be over 100!
The 6x7 frame was scanned at 2000 dpi but
was cropped on one side due to a light leak and
reduced to an equivalent of a 1000 dpi scan
(final size is 2461x2098 pixels) so
that it is a reasonable size for the web.
It was also turned into a monochrome negative
to make it easiest to see the small smudges
that are distant galaxies. The identifications
that were added are based on the Millennium
Star Atlas, which turns out to be just about
perfect for this small scope. Almost all of
the galaxies plotted in that atlas can be seen
on the photograph (though many more stars are
shown on the photograph than the atlas).
Click on the small version shown below to look at the
full 1000 dpi version. If you don't want to
download the whole thing, the blowup shown at
the bottom of this page is of the center
part of the frame at 1000 dpi scan resolution.
This area is known as Markarian's Chain.
Exposure was 45 minutes on unhypered Kodak
PPF400 (120 format).
A Planet Town 6x7 format astro camera with
vacuum film holder was attached to a
Borg 100mm refractor
at F4, and autoguided with an
attached to a
Borg 76MM refractor.