Imaging telescopes or lenses: William Optics RedCat 51 Petzval APO
Imaging cameras: ZWO ASI183MC Pro
Mounts: Sky-Watcher EQ-6R Pro SynScan
Guiding telescopes or lenses: ZWO 30mm f/4 Guide Scope
Guiding cameras: ASI224MC
Software: Pleiades Astrophoto PixInsight · IDEIKI AstroPhotography Tool (APT) · Stark Labs Nebulosity 4.2 · SharpCap Pro 3.2 · PHD2 Guiding
Filters: Astronomik L2 UV/IR Cut
Dates:Sept. 7, 2019
Frames:Astronomik L2 UV/IR Cut: 30x120" (gain: 100.00) -15C bin 1x1
Integration: 1.0 hours
Darks: ~30
Flats: ~30
Flat darks: ~30
Avg. Moon age: 8.70 days
Avg. Moon phase: 63.79%
Bortle Dark-Sky Scale: 4.00
Mean SQM: 20.00
Mean FWHM: 6.00
Temperature: 15.00
Astrometry.net job: 2921266
RA center: 22h 15' 12"
DEC center: +49° 53' 13"
Pixel scale: 1.993 arcsec/pixel
Orientation: 176.419 degrees
Field radius: 1.829 degrees
Resolution: 5494x3670
Data source: Backyard
NGC 7243, Caldwell 16, is an open cluster in the constellation Lacerta. It lies approximately 2,800 light-years away, and is thought to be just over 100 million years old, consisting mainly of white and blue stars.
The first image ("original") was First Light for the William Optics 51mm f/4.9 Petzval "RedCat" Apo refractor. The next ("final") image was after tweaking the collimation and support screws around the objective cell, while viewing an artificial star. Both images are deliberately un-cropped.
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