APOD: Massive Nearby Spiral Galaxy NGC 2841 (2021 Jan 24)

Comments and questions about the APOD on the main view screen.
montylc2001
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Re: APOD: Massive Nearby Spiral Galaxy NGC 2841 (2021 Jan 24)

Post by montylc2001 » Sun Jan 24, 2021 9:45 pm

What is the black dot located lower left in the core area? It's not present in other images, and does not seem to be a camera artifact or other processing artifact.

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johnnydeep
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Re: APOD: Massive Nearby Spiral Galaxy NGC 2841 (2021 Jan 24)

Post by johnnydeep » Mon Jan 25, 2021 2:00 am

montylc2001 wrote: Sun Jan 24, 2021 9:45 pm What is the black dot located lower left in the core area? It's not present in other images, and does not seem to be a camera artifact or other processing artifact.
Read the previous responses by Chris Peterson. It’s almost certainly a processing artifact.
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WWW

Re: APOD: Massive Nearby Spiral Galaxy NGC 2841 (2021 Jan 24)

Post by WWW » Mon Jan 25, 2021 3:25 am

Also seen in this APOD (with an expanded view) are two streaks from moving objects, possibly one of a satellite and one a small meteor, see lower far left and upper far right of the galaxy ring.

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