Closeup of Comet C/2023 A3 (Tsuchinshan-ATLAS) (Jim Lindelien)

Celestial hemisphere: Northern · Constellation: Serpens (Ser) · Contains: Solar system body or event

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Closeup of Comet C/2023 A3 (Tsuchinshan-ATLAS)

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Closeup of Comet C/2023 A3 (Tsuchinshan-ATLAS)

A closer look at the comet and its anti-tail spike.

A star-registered stack was created and STX used to extract the starfield for later combination with a starless image of the comet-registered stack created with PixInsight's CometAlignment process.

The 1.50 and 1.00 second subs were at camera gain 198; the 0.75 second at gain 252. Offset 100 for all. These decisions were made "on the fly" while evaluating subjective image quality in the N.I.N.A. capture session, to maximize signal without saturating pixels in the comet's nucleus.

All images were dithered via N.I.N.A's direct guider, then drizzle stacked at 2x, and downscaled back to native resolution. No bias, dark nor flat frames were used.

Imaged 15-Oct-24 from 18:48:00 - 18:58:07 local time, (16-Oct-24 04:48:00 - 04:58:07 UTC).

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Title: Equipment

Description: For Tsuchinshan-ATLAS photos, an ADM dual side-by-side saddle held, for widefields, the Rokinon 135mm w/ ASI128MC-Pro; and for closeups, the WO Zstar 71-II with an ASI585MC-Pro.

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WO Star 71

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Closeup of Comet C/2023 A3 (Tsuchinshan-ATLAS)

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Closeup of Comet C/2023 A3 (Tsuchinshan-ATLAS)

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