12P/Pons-Brooks 2023-Dec-13 Dan Bartlett

On this date, comet 12P/ Pons-Brooks underwent another large/bright outburst subsequently giving rise to the familiar "devil" horns from previous ruptures. These 27 x 120 light frames show NO signs of this outburst although it happened sometime during this night of imaging.

Full Resolution DownLoad: https://astrob.in/u53sss/B/

Observational details:
Backyard setup
scope: C14HyperStar D = 356mm; fl =729mm;
exposure: 27 x 120 sec
Seeing: 4/5
Transparency: 8/10
Observer: DEBartlett
Place: June Lake_California USA


image info (all):
Projection ............... Gnomonic
Projection origin ........ [1518.866963 1015.457030] px -> [RA: 18 52 34.837 Dec: +38 06 29.09]
Resolution ............... 2.128 arcsec/px
Rotation ................. -2.576 deg
Reference system ......... ICRS
Observation start time ... 2023-12-14 02:43:58 UTC
Observation end time ..... 2023-12-14 03:44:51 UTC
Geodetic coordinates ..... 119 04 46 W 37 46 30 N 2357 m
Focal distance ........... 728.83 mm
Pixel size ............... 7.52 um
Field of view ............ 1d 47' 45.6" x 1d 12' 2.4"
Image center ............. RA: 18 52 34.833 Dec: +38 06 29.11 ex: +0.046112 px ey: -0.351045 px
Image bounds:
top-left .............. RA: 18 57 02.072 Dec: +38 44 29.24 ex: -1.304029 px ey: -1.779824 px
top-right ............. RA: 18 47 51.380 Dec: +38 39 32.36 ex: +0.470954 px ey: -1.477148 px
bottom-left ........... RA: 18 57 13.894 Dec: +37 32 41.20 ex: -1.620154 px ey: +0.641297 px
bottom-right .......... RA: 18 48 12.090 Dec: +37 27 50.50 ex: +0.508180 px ey: +0.922813 px