Telescope: Celestron C9.25 @ f/10, Orion Atlas EQ-G
Camera: QHY 168c, -10C
Filter: Orion Imaging Skyglow Filter
Guide scope: Astro-Tech 60mm, ASI290MM Mini, PHD2
Exposure: 15x120sec saved as FITS
Darks: 32x120sec saved as FITS
Flats: 32x10sec, LED tracing tablet
Average Light Pollution: Red zone, fair transparency
Lensed Sky Quality Meter: 18.5 mag/arc-sec^2
Stacking: Mean with a 2-sigma clip.
White Balance: Nebulosity Automatic
Software: SharpCap Pro, Deep Sky Stacker, Nebulosity, Photoshop
Visually, the Ring appears as a ghostly smoke ring about the size of Jupiter. The nebula itself is not actually a ring, but more likely a torus or a short hour-glass, we just happen to the looking down the long axis, giving the nebula its characteristic shape.
M57 is currently well placed rising in the northeast as twilight darkens and is visible for most of the night.
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