Imaging telescopes or lenses: Celestron C6 SCT
Imaging cameras: ZWO ASI183MC Pro
Mounts: Celestron AVX Mount
Guiding cameras: ASI224MC
Focal reducers: Celestron f/6.3 Focal Reducer
Software: IDEIKI AstroPhotography Tool (APT) · Stark Labs Nebulosity 4.2 · Digital Photo Professional · Annie's Astro Actions V7 · Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions · PHD2 Guiding
Filters: IDAS UIBAR-III
Accessory: Celestron OAG #93648
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 degrees
Resolution: 4802x3202
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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