2023e1 20230709 dbartlett

10.2 Magnitude Comet C/2023 E1 (ATLAS) 
These images stack almost two hours of integration time as this comet is at declination of around 80 degrees N.  I've attempted to "go deep" and bring out the faint plasma tail, in so doing the IFN in and around Ursa Minor makes the field messy.

I used the color calibration method found here to make the comet as "true" to color as possible although the saturation has been exploited somewhat.  As usual I like to post an inverted color image since it highlights some of the fainter details as well as galaxies in the area.

I'm also using a new scope here since my dark mountain skies seem to be okay with the added aperture and fast F#.

Observational details:
Backyard setup
scope: C14 D = 356mm; fl =729mm; F# 2
camera: asi 2600mcP
exposure: 57 x120 sec
Seeing: 4/5
Transparency: 8/10
Observer: DEBartlett
Location: June Lake, California, USA

CometOnly Images (Full resolution-stars removed)
Resolution ............... 1.064 arcsec/px
Rotation ................. -1.338 deg
Reference system ......... ICRS
Observation start time ... 2023-07-10 06:54:11 UTC
Observation end time ..... 2023-07-10 06:56:11 UTC
Geodetic coordinates ..... 119 04 46 W  37 46 30 N  2357 m
Focal distance ........... 728.93 mm
Pixel size ............... 3.76 um
Field of view ............ 1d 28' 34.5" x 1d 6' 52.2"
Image center ............. RA: 16 53 33.408  Dec: +80 26 21.17  ex: -0.000708 px  ey: +0.000056 px
Image bounds:
   top-left .............. RA: 17 12 04.209  Dec: +80 59 03.51  ex: -0.005045 px  ey: -0.000822 px
   top-right ............. RA: 16 34 26.143  Dec: +80 56 57.18  ex: +0.048273 px  ey: -0.038153 px
   bottom-left ........... RA: 17 10 38.293  Dec: +79 52 19.70  ex: -0.002870 px  ey: +0.002053 px
   bottom-right .......... RA: 16 37 07.633  Dec: +79 50 24.64  ex: +0.005601 px  ey: +0.002994 px