Contains: M 1, Crab nebula, NGC 1952
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M1: Crab Nebula (RGB+Narrowband)

Technical card

Resolution: 4500x3000

Dates: Nov. 13, 2016Jan. 5, 2017

Frames:
45x300" (gain: 11.00)
ZWO H-alpha 7nm: 10x300" (gain: 150.00)
ZWO OIII: 10x300" (gain: 150.00)

Integration: 5.4 hours

Avg. Moon age: 10.28 days

Avg. Moon phase: 72.39%

Astrometry.net job: 1588832

RA center: 83.644 degrees

DEC center: 22.017 degrees

Pixel scale: 0.577 arcsec/pixel

Orientation: -73.448 degrees

Field radius: 0.433 degrees

Description

The collimation was embarrassingly off for this one. But this was a processing experiment - I wanted to see if I could add narrowband data from the ZWO ASI 1600 into my RGB version of M1 taken with the QHY183C. It was a quick process - just 50% Ha in red and 50% O3 in blue and green, and only for the nebula itself.

Comments

Author

Chris Sullivan
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Revisions

B

Ran the HLVG filter in medium.

C

Desaturated, selective color adjustments, levels adjustments.

Sky plot

Sky plot

Histogram

M1: Crab Nebula (RGB+Narrowband), Chris Sullivan

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Cloudy Nights
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