13p 20240730 dbartlett

Continuing the exercise in plasma tail disruption, here is comet 13P/ Olbers showing an up and down variance seen before in previous images.  Only used 28 x 60second subs for stacking due to a faint undulation of what appeared to be noctilucent clouds.  
 
  
 
Dan
 
 
 
Full Resolution:
https://astrob.in/8s4vnc/B/
 
 
 
Backyard setup
scope: RASA 11  fl620mm D279mm
exposure: 31 x 60 sec 
Seeing: 3/5
Transparency 6.5/10 noctilucent clouds
Observer: DEBartlett
Place: June Lake_California USA (Altitude +7700ft)
 
Image Info (Processed ):
(All images processed solely using PixInsight)
Projection ............... Gnomonic
Projection origin ........ [2304.399633 1504.024450] px -> [RA: 11 13 40.012  Dec: +36 14 34.58]
Resolution ............... 2.512 arcsec/px
Rotation ................. 1.549 deg
Reference system ......... ICRS
Observation start time ... 2024-07-30 05:15:46 UTC
Focal distance ........... 617.54 mm
Pixel size ............... 7.52 um
Field of view ............ 3d 12' 56.6" x 2d 5' 55.3"
Image center ............. RA: 11 13 40.029  Dec: +36 14 34.67  ex: +0.080261 px  ey: -0.016085 px
Image bounds:
   top-left .............. RA: 11 21 52.978  Dec: +37 13 52.23  ex: -0.183689 px  ey: -1.127672 px
   top-right ............. RA: 11 05 43.683  Dec: +37 19 02.70  ex: -2.010269 px  ey: -0.659354 px
   bottom-left ........... RA: 11 21 22.444  Dec: +35 08 15.13  ex: +0.844419 px  ey: +2.165324 px
   bottom-right .......... RA: 11 05 40.408  Dec: +35 13 23.47  ex: -0.654512 px  ey: +1.116581 px