2021g2 20250624 dbartlett

C/2021_G2_ATLAS_C14Hyerstar_ASI6200mcP_9x300sec_2025_06_24_010203local_JuneLake_California_USA_DEBartlett
 
Many imagers of comet C/2021 G2 ATLAS are seeing the same surprisingly modest tail of this comet well past its September 2024 perihelion date. Both the comet's distance from us and the sun are considerable being 4.74AU and 5.45 AU respectably.
 
 
 

 
 
Observational Info:
scope: C14  fl729mm F/2
Camera: asi6200mcP
image: 9x300sec
Seeing: 4.5/5
Transparency: 7/10 
Observer: DEBartlett
Place: JuneLake California USA (Altitude +2357m)
 
Image Info (widefield ):
Down sampled 2x2 (CMOS = BIN 2x2)
Projection ............... Gnomonic
Projection origin ........ [4567.935805 3061.950565] px -> [RA: 15 05 45.811  Dec:  -2 02 16.54]
Resolution ............... 2.126 arcsec/px
Rotation ................. -2.532 deg
Reference system ......... ICRS
Observation start time ... 2025-06-24 07:51:18 UTC
Observation end time ..... 2025-06-24 08:41:50 UTC
Geodetic coordinates ..... 119 04 46 W  37 46 51 N  2434 m
Focal distance ........... 730.71 mm
Pixel size ............... 3.76 um
Field of view ............ 2d 41' 36.8" x 1d 48' 19.9"
Image center ............. RA: 15 05 45.811  Dec:  -2 02 16.54  ex: -0.023728 px  ey: +0.014188 px
Image bounds:
   top-left .............. RA: 15 10 58.119  Dec:  -1 04 46.66  ex: -1.119850 px  ey: -1.157286 px
   top-right ............. RA: 15 00 14.508  Dec:  -1 11 52.02  ex: +2.334771 px  ey: -1.161867 px
   bottom-left ........... RA: 15 11 17.278  Dec:  -2 52 36.54  ex: -1.882389 px  ey: +0.317128 px
   bottom-right .......... RA: 15 00 32.979  Dec:  -2 59 43.92  ex: +1.203180 px  ey: +0.239875 px
 
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