12P/Pons-Brooks 2024-Mar-08 Dan Bartlett

_12P_Pons_Brooks_Samyang135_F2p4_asi6200mcP_19x120sec_2024_03_08_193020PST_JuneLake_California_USA_DEBartlett

Trying to keep up with the Virtual Telescope Project's exciting post earlier this week... Using a Samyang 135mm @ F2.4 and a full frame asi6200mcP, piggybacked on a RASA8, I had a moment between storms last night. The comet showed interesting dynamics as it hovered above the mountain ridges from light twilight till set - about 40 minutes. Was able to see some details in M31 as I continued to image after the comet set, for another 38 minutes, until M31 also set. The comet's color was quite a bit easer to notice than M31 during processing, with its bluish tail standing out.

Full Resolution Image:
https://astrob.in/bckwq9/B/



Observational details:
Backyard setup
scope: Rokinon = 135mm F2.4
exposure: 19 x 120 sec (comet) 38 x 120 (Starfield)
Seeing: 4.5/5
Transparency 8/10
Observer: DEBartlett
Place: June Lake_California USA


Image Info (standard images):
Projection ............... Gnomonic
Projection origin ........ [1535.658691 2361.740294] px -> [RA: 0 29 37.590 Dec: +38 42 26.41]
Resolution ............... 11.972 arcsec/px
Rotation ................. 24.652 deg
Reference system ......... ICRS
Observation start time ... 2024-03-09 03:07:08 UTC
Observation end time ..... 2024-03-09 04:17:44 UTC
Geodetic coordinates ..... 119 04 46 W 37 46 51 N 2360 m
Focal distance ........... 129.57 mm
Pixel size ............... 7.52 um
Field of view ............ 10d 12' 32.8" x 15d 41' 45.9"
Image center ............. RA: 0 29 37.590 Dec: +38 42 26.39 ex: +0.078798 px ey: -0.006173 px
Image bounds:
top-left .............. RA: 1 12 38.060 Dec: +43 11 19.76 ex: -1.479622 px ey: -1.244630 px
top-right ............. RA: 0 21 37.203 Dec: +47 51 23.60 ex: +0.503661 px ey: -1.087157 px
bottom-left ........... RA: 0 35 45.553 Dec: +29 32 51.34 ex: -1.412342 px ey: +1.858413 px
bottom-right .......... RA: 23 52 04.6