C/2023 H2 (Lemmon) 2023-Nov-11 Dan Bartlett

So much data to choose from to process for C/2023 H2 Lemmon, so I let the animation tell me which 20 minutes to stack. I also hesitated and chose not to resample the images so these are rather large files even using 80% JPEG compression so I dare not add the files here (accept a sample of each).

First a link to the animation for only two nights. In the animation you can see the sensitivity of the tail due to changes (both sky and actual comet changes) over the course of the hour or two for each night. Animation: https://astrob.in/4cugw3/0/

The next two stacked images are from two separate scopes.

For the closeup: https://astrob.in/pwzmkl/B/
Observational details:
Backyard setup
scope: C14 D = 356mm; fl =729mm;
exposure: 40 x30 sec
Seeing: 4/5 both
Transparency: 9/10
Observer: DEBartlett

Image details:
Projection ............... Gnomonic
Projection origin ........ [3061.632198 1998.176700] px -> [RA: 19 17 13.013 Dec: +9 08 03.88]
Resolution ............... 1.064 arcsec/px
Rotation ................. -6.831 deg
Reference system ......... ICRS
Observation start time ... 2023-11-12 04:40:21 UTC
Observation end time ..... 2023-11-12 04:40:51 UTC
Geodetic coordinates ..... 119 04 46 W 37 46 30 N 2357 m
Focal distance ........... 728.59 mm
Pixel size ............... 3.76 um
Field of view ............ 1d 48' 37.7" x 1d 10' 53.6"
Image center ............. RA: 19 17 13.015 Dec: +9 08 03.91 ex: -0.071002 px ey: -0.087065 px
Image bounds:
top-left .............. RA: 19 20 34.522 Dec: +9 49 36.61 ex: -1.596205 px ey: -2.237607 px
top-right ............. RA: 19 13 17.618 Dec: +9 36 34.42 ex: +1.388799 px ey: -1.821081 px
bottom-left ........... RA: 19 21 07.812 Dec: +8 39 22.66 ex: -1.816333 px ey: +0.231427 px
bottom-right .......... RA: 19 13 52.146 Dec: +8 26 22.28 ex: +0.341537 px ey: +0.251065 px