Project Notes:
Exceptionally transparent night with combined stacked magnitude reaching 20
The central condensation of comet 220P appears bullet like with shroud encompassing the brightess elongated section.
Extensive IFN present once again.
Dust tail is fainter and difficult to discern among the IFN.
Dust tail extends past the FOV.
Measure brightness 7.8 magnitude.
Observational details:
Backyard setup
2xscopes Tandem: RASA11 D = 279mm; fl =620mm; F# 2.2
camera: asi6200mmP and asi6200mcP
Seeing: 3.5/5
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
Acquisition...............108x120sec total
Resolution ............... 2.501 arcsec/px
Rotation ................. -2.571 deg
Field of view ............ 2d 56' 38.5" x 1d 48' 47.2"
Image center ............. RA: 2 43 19.705 Dec: +9 21 00.98
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 08 10.46 C 7.8 AG 28.0T 2C840 7.3 1.93 252 ICQ XX BARaeI a120C 7.26mZCP IMX TYT 0 U9*0.21 9.0 2.5s 2.5 Location: June Lake Overlook (MPC U66); Comment: Comet Alt. 46.7
COD U66
OBS
CATALOG: ATLAS2 - BAND: g (Sun Mag=-26.46)
10x10 20x20 30x30 40x40 50x50 60x60 RSR FC COD
COMET UTC +/- +/- +/- +/- +/- +/- N FWHM CAT
------------ ------------------- ----- ----- ----- ----- ----- ----- ---- ---- ---
220P 10/08/2026 11:03:12 12.12 11.29 10.81 10.42 10.14 9.92 77.7 18.6 U66
220P 10/08/2026 11:03:12* 0.21 0.21 0.21 0.21 0.21 0.21 32 23.4 ATL
AFRHO LOG
COMET UTC DELTA r AP " MAG RSR CM +/- AFRHO OBS
------------ ------------------- ----- ----- ----- ----- --- ----- ---- ----- ---
220P 10/08/2026 11:03:12 1.22 1.65 22.62 11.13 78 3341 1297 3.524 U66 |
Page last updated: Sun 6 Sep 10:43:40 BST 2026