Comet Tsuchinshan-Atlas, C/2023 A3 16 October 2024

Comet Tsuchinshan-Atlas was barely at naked eye visibility.

Note the anti-tail is visible below the nucleus.

Hover over the image for an annotated view.

Date:  18 October 2024

FOV:  approximately 17° 34' × 26° 22' the length of the tail is over 20°

Lens:  Canon EF-S 75-300mm f/4.0-5.6 lens at 77.97mm

Guiding:  none, tracking only

Computer:  ASIair pro Raspberry Pi

Mount:  ZWO AM5 mount

Camera:  ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS, 100 gain

Pixel size:  3.76 μm

Resolution:  9.947 arcsec/pixel

Filter:  Optolong UV-IR cut filter

Stacking:  ten 15 second frames

Calibration frames:  darks, flats, and dark flats

Total Time:  2 minutes 30 seconds

Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT,

Linear → HST, GHS, MStr → Comet, Masked Sat

Foreground:  same as above for first frame of the ten

GIMP:  cropped the foreground tree and added to Comet with layers

Location:  Selkirk State Park near Pulaski, NY