Galaxy NGC 891
Characteristics:
Magnitude: 10.0
Size: 13.5'
Distance: ?about 10 million light years
RA: 02h 22m 36s
Dec: 42 degrees 21' 00"
Description:
The beautiful edge-on galaxy NGC 891 is located in Andromeda and has
particular meaning to us, since it's probably how our galaxy looks as
well. It's a spiral galaxy that contains a broad band of dust
cutting through the center of the disk, preventing transmission of
background light. At 10 million light years away and magnitude
10, it was a challenging object for the 10D, requiring 7 frames exposed
for 7 minutes each at ISO1600. The foreground stars are all
members of our Milky Way galaxy.
Photographic Details:
Date: September 6, 2003
Scope: LX90 at f6.5, Lumicon OAG
Autoguider: SBIG STV with e-finder
Camera: Canon 10D
Filter: IDAS LPS
Exposures: 7 x 7' each at ISO1600
Conditions: Temperature 68 degress F; average transparency;
average seeing; wind minimal.
Post-processing: Raw conversion, adaptive dark frame subtraction,
alignment, min/max excluded averaging, and background compensation done
in ImagesPlus; levels and curves adjustment in Photoshop.
Please
note: Graphics on this website
may not be reproduced without author permission.
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