Telescope: Astro-Tech 8” f/8 Ritchey-Chretien, Orion Atlas EQ-G
Camera: Full Spectrum Modified Nikon D5300, Baader Mk III MPCC
Filter: Orion Imaging Skyglow Filter
Guide scope: Astro-Tech 60mm, Meade DSI Pro II, PHD2
Exposure: 20x60sec, ISO 200, saved as RAW
Darks: Internal (Long Exposure Noise Reduction On)
Flats: 32x1/10sec, Tee shirt flats taken at dusk
Average Light Pollution: Red zone, Bortle 8, fair transparency, bright moonlight
Lensed Sky Quality Meter: 17.7 mag/arc-sec^2
Stacking: Mean with a 2-sigma clip.
White Balance: Nebulosity Automatic
Software: Backyard Nikon, Deep Sky Stacker, Nebulosity, Photoshop
The Blinking Planetary is one of my favorite little planetary nebula. It is fairly bright and easy to locate. The nickname comes from an interesting effect that occurs when you try to look directly at the nebula through a telescope. Briefly, the nebula is illuminated by a bright (Mv 10) central star and when you look directly at the nebula your eye tends to concentrate on the star and the nebula appears to fade; looking off to one side and the side the nebula re-appears.