NGC891, Edge-on Spiral Galaxy in
the un-cropped image
Takahashi FS-152 f/8 fluorite refractor at f/8.
II German Equatorial Mount
Barbara Instrument Group ST-8E NABG CCD camera (1530 x 1020 pixels, 9 x 9mm, monochromatic, 16 bit, 13.8 x 9.2mm array)
color filter wheel with IR-blocking red, green, blue and Hydrogen-Alpha
(deep red) dichroic filters
Sunday September 16, 2001
Mt. Pinos, CA
Approx. 8300', OAT +40ºF
time: 2.5 hours
LRGB (80:20:20:30 minutes)
exposures were shot binned 2x2
exposures were 10 minutes each.
NGC891 is an
edge-on spiral galaxy located in Andromeda. The apparent size of this Galaxy is
1 x 12 arc minutes, and it glows warmly at a total magnitude of about 12.
Burnham gives its distance as 43 million light-years and a diameter of 120,000
light-years, making it a little larger than our own Milky Way Galaxy. A thin
layer of dust surrounding this galaxy blocks some of its light, creating the
dark lane in this image. North is to the left.