2025a6 20250825 dbartlett

[comet-images] C/2025 A6 Lemmon Tail! From August 25 2025
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29/08/2025 03:54
 
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C_2025_A6_Lemmon_RASA11_asi2600mcP_33x90sec_2025_08_25_050757local_JuneLake_California_USA_DEBartlett
 
 
 
We have a Tail!  Comet C/2025 A6 Lemmon from August 25 2025
 
 
 
 
 
 

    The tail measured at 5' and at 286 degrees can be better viewed on the BIN1x1 closeups. 
    The comet is still quite low in the morning skies however more than 45minutes are stacked here. 
    The starfield has many small galaxies including an apparent reddish galaxy cluster at the termination of comet Lemmon's tail. 
    C/2025 A6 has a  very distinct bluish hue , whereas the tail differs, as one looks at the inverted color closeup. 
    As usual the image has been color calibrated using SPCC. 
    Delay in processing the data due to travel and unexpecting results.  

 

Observational Notes:
scope: RASA11  fl620mm F/2
Camera: asi2600mcP
image: 33x90sec
Seeing: 3.5/5
Transparency: 7.5/10 
Observer: DEBartlett
Place: JuneLake California USA (Altitude +2357m)
 
 
 
Image Info (widefield BIN2x2),Closeup BIN1x1 :
(All images processed solely using PixInsight, Comet Photometry using Tycho-Tracker)
Resolution ............... 1.253 arcsec/px BIN1x1
Rotation ................. 170.591 deg
Focal distance ........... 619.09 mm
Pixel size ............... 3.76 um
Field of view ............ 1d 57' 51.8" x 1d 18' 33.7"
Image center ............. RA:  7 47 48.355  Dec: +30 54 44.74