M76 – Planetary Nebula in Perseus

Telescope: Meade N6 at f/5, Orion Atlas EQ-G
Camera: ZWO ASI1600MM-c v3
Filters: Orion Imaging Skyglow pre-filter, Meade LRGB filters
Sensor Temperature: -10C, Gain: 200, Offset: 30
Guide scope: Williams Optics 50mm, Meade DSI Pro II, PHD
Luminance: 51x60sec , 1x1, saved as FITS
RGB: 10x90sec , 1x1, saved as FITS
Darks: 32x60sec & 90sec saved as FITS
Flats: 32x0.05sec, LRGB, Tee-shirt flats taken during dusk
Average Light Pollution: Red zone, fair transparency
Lensed Sky Quality Meter: 18.6 mag/arc-sec^2
Stacking: Mean with a 2-sigma clip.
White Balance: Nebulosity Automatic
Software: Nebulosity, Deep Sky Stacker, Photoshop

M76 is one of my favorite imaging targets. I’ll never forget the first time I found this object during a Messier Marathon out at John Bryan in 1978 with my homebuilt 10” f/6.7 Newtonian. The central bar was easy to see, but I did not know about the outer halo until I took my first picture of it. The bar is thought to be a ring seen edge-on to our line of sight. Transparency wasn’t the best on this particular night and I only caught a bit of the outer gossamer veil. I really want to try this camera at f/4, but I need to switch over to the ZWO EFW with 31mm filters to do that. I have the EFW and the filters should be here shortly. Once the filter wheel is automated that could get really fun!

-John

M76 (12-20-2017)-1j.jpg