2023a3 20241107 dbartlett

Racing the Moonlight, Comet C/2023 A3 Tsuchinshan-ATLAS Still Shines in Ophiuchus, November 07 2024UT
 
 
 
Notes:
 1.  Went for a single panel covering around 2.5 degrees in length, fearing the waxing crescent would eliminate imaging  a much larger mosaic.  So much easier than a mosaic!
  2.  Reduced the exposure time by 15 seconds keeping the mean ADU to around 1100 or less.
  3.  Platesolving  a single panel allows for an inverted annotated view.
  4.  The "ruddy" color has been calibrated using SPCC and I enjoyed a little freedom overindulging in color saturation.  Why not it's pretty nifty.
  5.  Interesting jet-like features are present and a hint of green still persists in the front of the coma. 
 
 
 

 
 
 
Observational Notes:
scope: C14  fl729mm F/2
Camera: asi6200mcP
image: 58x45sec
Seeing: 4.5/5
Transparency: 9.5/10 
Observer: DEBartlett
Place: JuneLake California USA (Altitude +2357m)
 
Image Info (all ):
Down sampled 2x2 (CMOS = BIN 2x2)
(All images processed solely using PixInsight)
Projection ............... Gnomonic
Projection origin ........ [2246.917529 1418.763772] px -> [RA: 18 25 28.393  Dec:  +4 08 07.89]
Resolution ............... 2.122 arcsec/px
Rotation ................. -3.130 deg
Reference system ......... ICRS
Observation start time ... 2024-11-07 02:03:21 UTC
Geodetic coordinates ..... 119 04 46 W  37 46 30 N  2357 m
Focal distance ........... 730.83 mm
Pixel size ............... 7.52 um
Field of view ............ 2d 38' 58.0" x 1d 40' 23.3"
Image center ............. RA: 18 25 28.393  Dec:  +4 08 07.89  ex: +0.001006 px  ey: +0.003047 px
Image bounds:
   top-left .............. RA: 18 30 34.957  Dec:  +5 02 16.86  ex: -1.186133 px  ey: -1.288814 px
   top-right ............. RA: 18 19 59.769  Dec:  +4 53 37.16  ex: +1.877338 px  ey: -1.281099 px
   bottom-left ........... RA: 18 30 56.227  Dec:  +3 22 25.75  ex: -1.627634 px  ey: +0.641495 px
   bottom-right .......... RA: 18 20 21.959  Dec:  +3 13 42.90  ex: +0.380255 px  ey: +0.430766 px
   
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