117P/Helin-Roman-Alu 2022-Jul-26 Dan Bartlett

Full resolution can be found here:
https://astrob.in/g67ase/0/
This was a tough one since the comet was only 19.8 degrees up off the meridian. Altitude/refraction played havoc on the color, size, brightness and shape of the rich Sagittarius starfield.

Observer info:
scope RASA 11 F/2.2
cam asi2600mcP
77 x 60 seconds
seeing4/5
trans 8/10
June Lake, California, USA
DEBartlett

Image info:
WCS transformation ....... Linear
Projection ............... Gnomonic
Projection origin ........ [1665.482017 1115.998702] px -> [RA: 18 31 22.696 Dec: -32 20 55.05]
Resolution ............... 1.879 arcsec/px
Rotation ................. 88.037 deg
Reference system ......... ICRS
Observation start time ... 2022-07-27 05:02:58 UTC
Focal distance ........... 618.89 mm
Pixel size ............... 5.64 um
Field of view ............ 1d 44' 20.2" x 1d 9' 54.8"
Image center ............. RA: 18 31 22.695 Dec: -32 20 55.02
Image bounds:
top-left .............. RA: 18 34 18.273 Dec: -33 11 44.28
top-right ............. RA: 18 33 57.772 Dec: -31 27 25.08
bottom-left ........... RA: 18 28 44.538 Dec: -33 14 12.86
bottom-right .......... RA: 18 28 30.383 Dec: -31 29 50.84

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