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C/2023 A3 Tsuchinshan-ATLAS on October 13 (Wide Field and Detail)

Astrophotography CMOS Comet Imaging
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#1 james7ca

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Posted 14 October 2024 - 12:27 AM

Taken Sunday night from near San Diego using a Nikon Z8 and a Voigtlander APO-Lanthar 50mm f/2 lens. This is a single frame exposed for 2s at f/2, ISO400. First up, a relatively wide field showing the horizon.

 

Image processing with Photohop 2024. I had to remove two airplane trails and I also rotated the image slightly away from level to eliminate a brightly lit house and I then "spot healed" a few distracting lights (i.e. the horizon line has been retouched).

 

You can click on the preview to read the captions and to see the full, CN-hosted image (1528 x 1200 pixels).

 

[UPDATE]

It's been pointed out that C/2023 A3 is now showing a faint antitail and if you look closely at the below image (perhaps using averted vision) you may be able to see that feature until it fades into the brighter, lower part of the sky. To see the antitail it probably helps if you are at a location with low light pollution and sparklingly clear skies. I'm imaging under Bortle 7 conditions and last night was not particularly clear so that may have made my situation less than ideal. That said, the current weather forecast for San Diego is for mostly overcast skies until this coming Friday, so Sunday night might have been my best opportunity to image the comet since it's getting fainter every day and the full moon is coming this Thursday.

[/UPDATE]

Attached Thumbnails

  • C:2023 A3 Tsuchinshan-ATLAS Wide Field Oct 13 2024.jpg

Edited by james7ca, 14 October 2024 - 05:58 AM.

  • Edward E, Jim Waters, Jaylab and 11 others like this

#2 james7ca

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Posted 14 October 2024 - 12:29 AM

Here is a larger crop showing the comet and more of the background stars. Same capture details as earlier (but no horizon with the crop).

 

[UPDATE]

I used SkySafari to measure between some of the background stars and it appears that the tail of the comet in this image is just about seven degrees in length. The apparent antitail is perhaps a few degrees in length, so in total a span of about ten degrees. Obviously, a darker sky would reveal more.

[/UPDATE]

Attached Thumbnails

  • C:2023 A3 Tsuchinshan-ATLAS Detail Oct 13 2024.jpg

Edited by james7ca, 14 October 2024 - 05:18 PM.

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#3 klangwolke

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Posted 14 October 2024 - 02:11 AM

This is nice, the dark silhouettes across the horizon, color gradient, snd the comet.  



#4 steppen

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Posted 14 October 2024 - 12:05 PM

Nice!



#5 saturner

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Posted 17 October 2024 - 10:21 PM

james7ca - I've looked at too many C/2023 A3 photos and this one is, by far, my favorite. Thank you so much for creating it and sharing!



#6 james7ca

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Posted 18 October 2024 - 01:22 AM

klangwolke, steppen, and saturner thanks for the comments and similarly to everyone else for the likes.


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#7 Sky King

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Posted 18 October 2024 - 01:01 PM

The composition, color and clarity makes it one of the better one! Very nice! Way to go! 




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