NGC 7479, Spiral Galaxy in Pegasus

Telescope: Meade SN8 at f/4, Orion Atlas EQ-G
Camera: ZWO ASI071MC, Orion Imaging Skyglow Filter
Sensor Temperature: 0C, Gain: 200, Offset: 50
Guide scope: Williams Optics 50mm, Meade DSI Pro II, PHD
Exposure: 123x120sec saved as FITS
Darks: 32x120sec saved as FITS
Flats: 32x10sec, LED tracing tablet, touched up with a synthetic flat
Average Light Pollution: Red zone, fair transparency, passing clouds
Lensed Sky Quality Meter: 18.5 mag/arc-sec^2
Stacking: Mean with a 2-sigma clip.
White Balance: Nebulosity Automatic
Software: Nebulosity, Deep Sky Stacker, Photoshop

NGC 7479 is a great example of a barred spiral. This is also one of my favorite unusual galaxies. Its low surface brightness makes it a bit of a challenge, but it is always fun to try.

We’ve recently had quite a mix of sky conditions with variable transparency and passing clouds during the night. To get the most out of these conditions I combined two separate images sets; 26 from the 15th and 97 from the 23rd. DSS did a great job aligning and combing the source images, though I had to touch it up with a synthetic flat to clean up an odd gradient.

-John

NGC 7479 (8-23-2017)-1j.jpg