NGC 1931 and IC 417
Size: NGC1931, 3 arcminutes; IC 417, 13 arcminutes.
05h 30m 01s
Dec: 34 degrees 19' 47"
These two nebulae are located in the Constellation Auriga (The
Charioteer). NGC 1931 is in the lower left, and IC 417 the upper
right. They both represent star clusters surrounded by
nebulosity. In fact, the entire region is filled with faint Ha
emission that can be appreciated in the above image. This region
is not often imaged, but the juxtaposition of these two nebulae make
for a photogenic pair. I have dubbed these two targets "The
Spider (IC 417) and the Fly (NGC 1931)", although you can name them
whatever you like! I also processed this image in color, which
shows NGC 1931 to be a mixed emission and reflection nebula similar to
the Cocoon or the Trifid Nebulae.
Date: October 21, 2006.
FSQ106 (second light image), on the G11 Losmandy
Autoguider: SBIG STV with
Camera: Maxcam CM10
Ha (6 nm) filter; Astronomik type II RGB filter set.
Exposures: 27 x 10' Ha; 7 x 5'
R; 7 x 5' G; 8 x 8' B
Conditions: Clear and cold-
temperatures down to about 35 degrees F during the night.
Post-processing: Debloomed, calibrated,
aligned in Maxim. Combined
using RC Sigma Reject
MaximDL, followed by DDP
in ImagesPlus (IP). Subsequent processing in Photoshop CS (16
note: Graphics on this website
may not be reproduced without author permission.
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