Last night was the first clear night since the full Hunter's Moon on 17 Oct. With no bright moonlight in the early evening, comet C/2023 A3 is easy to see in the western sky as twilight fades. It is visible to the unaided eye and is a spectacular sight in binoculars. The tail stretches about 14 degrees.
The measured sky brightness toward the north was sqml=21.0 mpsas. In the camera there was strong red airglow visible. In the images below, the layered airglow in the western sky is very distinct, although it is essentially invisible to the eye.
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Comet and Milky Way. 8:05 pm MDT. Sony A7iii + 20mm f/1.8 G, no filter. |
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8:06 pm MDT. Hoya Softon filter. |
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7:48 pm MDT. Sony A7iii + Samyang 35mm f/1.8 AF + softon filter. |
The Hoya Softon filter makes the relative brightness of the stars more apparent and the constellations become easily visible.
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8:25 pm MDT. Olympus E-M1iii + Sigma 56mm f/1.4 + softon filter. |
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8:13 pm MDT. Olympus E-M5iii + Rokinon 135mm f/2. |
The anti-tail is still visible. It is becoming more diffuse and no longer aligns with the dust tail. This image approximates the view I was seeing in 10x50 binoculars.
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