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IC 417 & NGC 1931 Spider & the Fly Nebulae

Technical card

Resolution: 3412x2430

Dates: Feb. 28, 2016

Frames: 32x900"

Integration: 8.0 hours

Avg. Moon age: 19.48 days

Avg. Moon phase: 76.84% job: 1130020

RA center: 82.294 degrees

DEC center: 34.400 degrees

Pixel scale: 1.434 arcsec/pixel

Orientation: -179.469 degrees

Field radius: 0.834 degrees

Locations: The Hills Observatory, Manchester, United Kingdom


I was experimenting with different bins with this image. The conclusion for Ha at least, don't bother stick to bin 1x1. With other bins the resolution is quite poor especially bin 4x4.

But the result was ok in the end. This is basically a Ha image, but I took 10 x 1min subs for R G & B and added those in with Ha to get coloured stars. The aim of this image was to go deep and I think I managed that with lots of faint nebula.

The actual sub exposures were (taken 20151224 to 20160228) :
900s x 8 bin1
1200s x 13 bin1
900s x 4 bin4
900s x 3 bin2

60s x 10 of each bin1



Mike Oates

Sky plot

Sky plot


IC 417 & NGC 1931 Spider & the Fly Nebulae, Mike Oates