C/2023 A3 (Tsuchinshan-ATLAS) 2024-May-29 Dan Bartlett

C_2023_A3_Tsuchinshan_ATLAS_C14Hyperstar_asi2600mcP_59x120sec_2024_05_29_224003PDT_JuneLake_California_USA_DEBartlett_NarrowField

Second night of capturing this starfield with brighter galaxies NGC4116 and NGC 4123 and comet C/2023 A3 Tsuchinshan-ATLAS. Although the sky conditions were nice with good seeing, the skies weren't as clean as the previous night. I've processed the image as near as identical as previous (see https://astrob.in/6onyjd/C/), differences still arose. I can't explain these differences. Interesting field of elliptical galaxies in the lower right hand corner of wide field images. This the narrow field view where I've cropped the image to approximately 1degree FOV, in order to focus on the comet and the nearby galaxies.

Full Resolution Image:https:
https://astrob.in/vyu2xt/B/


Backyard setup
scope: C14 HyperStar fl728mm D356mm
exposure: 59 x 120 sec
Seeing: 4/5
Transparency 9/10
Observer: DEBartlett
Place: June Lake_California USA

Narrow Field Image Info (Processed):
Projection ............... Gnomonic
Projection origin ........ [1883.032221 1359.238299] px -> [RA: 12 06 45.076 Dec: +2 32 06.91]
Resolution ............... 1.064 arcsec/px
Rotation ................. -4.085 deg
Reference system ......... ICRS
Observation start time ... 2024-05-30 04:59:31 UTC
Observation end time ..... 2024-05-30 07:28:58 UTC
Geodetic coordinates ..... 119 04 46 W 37 46 51 N 2360 m
Focal distance ........... 728.77 mm
Pixel size ............... 3.76 um
Field of view ............ 1d 6' 47.8" x 48' 13.6"
Image center ............. RA: 12 06 45.076 Dec: +2 32 06.91 ex: +0.000107 px ey: +0.000015 px
Image bounds:
top-left .............. RA: 12 08 51.515 Dec: +2 58 29.47 ex: -1.124728 px ey: -1.449683 px
top-right ............. RA: 12 04 25.073 Dec: +2 53 41.82 ex: +1.745614 px ey: -1.196777 px
bottom-left ........... RA: 12 09 05.219 Dec: +2 10 26.70 ex: -1.748356 px ey: +0.763380 px
bottom-right .......... RA: 12 04 38.733 Dec: +2 05 41.50 ex: +0.522951 px ey: +1.940797 px


Widefield Image Info (Processed):
Projection ............... Gnomonic
Projection origin ........ [1399.125367 1018.035970] px -> [RA: 12 07 05.482 Dec: +2 22 11.56]
Resolution ............... 2.128 arcsec/px
Rotation ................. -4.089 deg
Reference system ......... ICRS
Observation start time ... 2024-05-30 04:59:31 UTC
Observation end time ..... 2024-05-30 07:28:58 UTC
Geodetic coordinates ..... 119 04 46 W 37 46 51 N 2360 m
Focal distance ........... 728.83 mm
Pixel size ............... 7.52 um
Field of view ............ 1d 39' 14.0" x 1d 12' 12.5"
Image center ............. RA: 12 07 05.482 Dec: +2 22 11.55 ex: -0.000032 px ey: +0.002928 px
Image bounds:
top-left .............. RA: 12 10 13.053 Dec: +3 01 37.74 ex: -1.137678 px ey: -1.557331 px
top-right ............. RA: 12 03 37.580 Dec: +2 54 33.29 ex: +1.745431 px ey: -1.199860 px
bottom-left ........... RA: 12 10 33.347 Dec: +1 49 44.69 ex: -1.104120 px ey: +0.116342 px
bottom-right .......... RA: 12 03 58.171 Dec: +1 42 42.41 ex: +0.434204 px ey: +0.109272 px