13P/Olbers 2024-Apr-28 Dan Bartlett

_13P_Olbers_C14Hyper_asi2600mcP_38x30sec_2024_04_28_210001PDT_JuneLake_California_USA_DEBartlett

Atrocious seeing conditions yielding FWHM over 6 for the stacked image, with decent transparency. With a little deja vu happening here. 13P/ Olbers is in roughly the same sky position and twilight conditions as 12P/ Pons-Brooks at the start of the month. Comet activity is much improved from my location than earlier this month. From the annotated version, plenty of dark nebula in the comet field.

Full Resolution Image: https://astrob.in/piixe0/B/

Observational details:
Backyard setup
scope: C14 HyperStar fl728mm D356mm
exposure: 38 x 30 sec
Seeing: 1.5/5
Transparency 7/10
Observer: DEBartlett
Place: June Lake_California USA


Image Info (Processed images):
Projection ............... Gnomonic
Projection origin ........ [1431.857393 927.515242] px -> [RA: 4 37 16.529 Dec: +25 53 33.75]
Resolution ............... 2.130 arcsec/px
Rotation ................. -4.004 deg
Reference system ......... ICRS
Observation start time ... 2024-04-29 03:54:10 UTC
Observation end time ..... 2024-04-29 04:22:45 UTC
Geodetic coordinates ..... 119 04 46 W 37 46 51 N 2360 m
Focal distance ........... 728.37 mm
Pixel size ............... 7.52 um
Field of view ............ 1d 41' 39.9" x 1d 5' 50.9"
Image center ............. RA: 4 37 16.528 Dec: +25 53 33.75 ex: +0.000109 px ey: +0.000132 px
Image bounds:
top-left .............. RA: 4 40 52.529 Dec: +26 29 44.62 ex: -1.125497 px ey: -1.475877 px
top-right ............. RA: 4 33 20.296 Dec: +26 22 29.08 ex: +2.105282 px ey: -1.170684 px
bottom-left ........... RA: 4 41 10.670 Dec: +25 24 15.41 ex: -1.232947 px ey: +0.725346 px
bottom-right .......... RA: 4 33 42.622 Dec: +25 17 01.91 ex: +1.183918 px ey: +1.923623 px