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I agreeImaging telescope or lens:Celestron C6 SCT
Imaging camera:ZWO ASI183MC Pro
Mount:Celestron AVX Mount
Guiding camera:ASI224MC
Focal reducer:Celestron f/6.3 Focal Reducer
Software:Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions, Annie's Astro Actions V7, Stark Labs Nebulosity 4.2, Digital Photo Professional, IDEIKI AstroPhotography Tool (APT), PHD2 Guiding
Filter:IDAS UIBAR-III
Accessory:Celestron OAG #93648
Resolution: 4802x3202
Dates:Feb. 5, 2019
Frames:IDAS UIBAR-III: 18x120" (gain: 140.00) bin 1x1
Integration: 0.6 hours
Darks: ~30
Avg. Moon age: 0.56 days
Avg. Moon phase: 0.35%
Bortle Dark-Sky Scale: 4.00
Astrometry.net job: 2601865
RA center: 7h 41' 42"
DEC center: -14° 47' 34"
Pixel scale: 0.490 arcsec/pixel
Orientation: 357.141 degrees
Field radius: 0.393
Data source: Backyard
Messier 46 is an open cluster of stars in the constellation of Puppis. It was discovered by Charles Messier in 1771. Dreyer described it as "very bright, very rich, very large." M46 is about 4,900 light-years away. There are an estimated 500 stars in the cluster with a combined mass of 450 solar masses, and it is thought to be some 250 million years old.
NGC 2438. a planetary nebula, appears to lie within the cluster near its northern edge, but it is most likely unrelated since it does not share the cluster's radial velocity.
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