Comet Atlas K1 passes the Andromeda Galaxy M31
12/27/25

 

            
 This faint
            comet is well on its way out of the inner Solar System, but still
            even at 4 magnitudes fainter than its peak 10th magnitude - displays
            a fine long dust tail. While this "Golden Comet" which
            lacks carbon ices in its nucleus displayed a nice yellow coloration
            near peak brightness, now it has faded to nearly pure white.
            I was just able to fit both the Andromeda Galaxy and the comet
            in one frame with the MiniCat 51, making a great comparison between
            the two objects.

            
-Comet: C/2025 K1
            Atlas + M31

            -Date/Time Local: 12/27/25 7:00 pm MST

            -Date/Time UT: 12/28/25 2:00 UT

            -FOV: 464' x 310'

            -Orientation: S up

            -Seeing: 2

            -Transparency: 3

            -Orig. Scale: 5 arcsec/Pixel

            -Instrument: Williams Optics MiniCat 51 f/3.5

            -Exposure: 60 min total

            -Camera: ASI2600MC

            -Location: Payson,AZ



            
WO MiniCat 51 Astrograph

Select an image size for a larger view:

1600 x 1200
            



Processing Tools:  Maxim DL, Photoshop CS2

Lens:  Williams Optics Minicat 51 f/3.5
Platform:  Astrophysics AP1200
Camera:  ASI2600MC pro
Exposure:  60mins

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