Note: I'm surprised I don't see more imaging of this galaxy. It close to M81-M81 and
has an apparent diameter of 21.9" X 12.3" very close to the size of M81.
NGC 2403 (also known as
Caldwell 7) is an
intermediate spiral galaxy in the constellation
Camelopardalis. It is an outlying member of the
M81 Group, and is approximately 8 million
light-years distant. It bears a similarity to
M33, being about 50,000 light years in diameter and
containing numerous star-forming
H II regions.=10.5px The northern spiral arm connects it to the star
forming region
NGC 2404. NGC 2403 can be observed using 10×50
binoculars.
NGC 2404 is 940 light-years in diameter, making it one of the largest known H II regions. This H II region
represents striking similarity with
NGC 604 in M33, both in size and location in galaxy.
Information Credits:
WikipeadiaTelescope: Explorer Scientific 127mm CF APO Refractor f/7.5 (952mm Focal Length)
Explore Scientific X0.7 Reducer f/5.25 (667mm Focal Length)
Mount IOptron CEM40
Camera ZWOASI2600MC-Pro Temp -10C, Binning 1 x 1, Gain 100 Offset 50
79 X 300 Second Exposures W/Optolong UV/IR " Filter
37 X 300 Second Exposures W/Optolong L-Ultimate (3nm) Filter
20 Dark Frames/50 Flats/50 Bias
Total Integration Time: 9 Hours 40 Minutes
Acquisition with SharpCap
Stacked with Astro Pixel Processor
Guiding PHD2
Processed with Astra Image/GIMP
Photo taken from Seven Lakes, NC Bortle 4.5
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