220p 20260916 dbartlett

220P_McNaught_TandemRASA11s_asi6200mmP_asi6200mcP_77x300sec_20260916_041634_local_JuneLake_California_USA_DEBartlett
 

 
 

12th Magnitude Comet 220P/ McNaught Covers a Dust-Rich Starfield in Taurus Sept 16th 2026
 

 
 

ASTROBIN-Full Resolution, animations and other Goodies:
 

https://app.astrobin.com/i/b2ok7u?r=0
 

 
 

Project Notes:
 

    220P/ McNaught has faded to mag 11.9 and a tail extending more than 2.3 degrees. 
    Nearly 6.4 hours of subs has enhanced the dust rich starfield, which is reddened the distant background galaxies in the constellation of Taurus. 
    The comet is still holding a richness of greens and yellows especially around the elongated nuclear region. 
    As usual, color calibration was performed with PixInsight's SpectrometricColorCalibration process using a white balance of the spectral class of our sun as reference. 

 

 
 

Observational details:
 

    Backyard setup 
    2xscopes Tandem: RASA11 D = 279mm; fl =620mm; F# 2.2 
    camera: asi6200mmP and asi6200mcP 
    Seeing: 4/5  
    Transparency: 8/10 
    Observer: DEBartlett 
    Location: June Lake, California, USA 

 

 
 

Image Info:
 

(All images processed solely using PixInsight and Comet Photometry Tycho-Tracker)
 

    Resampled 2x2 
    WideField 
    Acquisition..............77x300sec 
    Resolution ............... 2.501 arcsec/px 
    Rotation ................. 179.231 deg (flipped) 
    Field of view ............ 2d 57' 34.5" x 1d 49' 52.8" 
    Image center ............. RA: 3 25 55.120 Dec: +7 22 37.5 

 

 
 

220P (McNaught)
 

ICQ line:
 

IIIYYYYMnL YYYY MM DD.DD eM/mm.m:r AAA.ATF/xxxx /dd.ddnDC /t.ttmANG ICQ XX*OBSxxf InT APERTURcamchip SFW C ## u.uu xx.x PIXELSIZE
 

220 2026 09 16.44 C 11.9 AR 28.0T 2L900 2.5 2.34 259 ICQ XX BARaeI a300C 2.50mZCP IMX TYT 0 U9*0.18 11.9 2.5s 2.5 Location: June Lake Overlook (MPC U66); Comment: Comet Alt. 54.7
 

 
 

COD U66
 

OBS
 

CATALOG: ATLAS2 - BAND: r (Sun Mag=-26.93)
 

 
 

 10x10 20x20 30x30 40x40 50x50 60x60 RSR FC COD
 

COMET UTC +/- +/- +/- +/- +/- +/- N FWHM CAT
 

------------ ------------------- ----- ----- ----- ----- ----- ----- ---- ---- ---
 

220P 16/09/2026 10:27:32 15.59 14.54 13.98 13.57 13.27 13.03 65.5 18.3 U66
 

220P 16/09/2026 10:27:32* 0.17 0.17 0.17 0.17 0.17 0.17 43 33.3 ATL
 

 
 

 AFRHO LOG
 

COMET UTC DELTA r AP " MAG RSR CM +/- AFRHO OBS
 

------------ ------------------- ----- ----- ----- ----- --- ----- ---- ----- ---
 

220P 16/09/2026 10:27:32 1.07 1.80 25.87 14.19 65 117 36 2.070 U66