Observation by Duncan Hale-Sutton: How far does the tail go?

Uploaded by

Duncan Hale-Sutton

Observer

Duncan Hale-Sutton

Observed

2024 Oct 18 - 18:24

Uploaded

2024 Oct 19 - 17:06

Objects

C/2023 A3

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Constellation

Ophiuchus

Field centre

RA: 17^h04^m
Dec: +03°43'
Position angle: +33°30'

Field size

30° × 30°

Equipment

Nikon D90 with a Nikkor VR 18-105 f/3.5-5.6 ED lens at 18mm

Exposure

16x10s at ISO 800, f/3.5

Location

Neatishead, Norfolk

Target name

Comet C/2023 A3 Tsuchinshan-Atlas

Title

How far does the tail go?

About this image

This is the same image as I posted previously, but I have turned it into black and white, inverted it and increased the contrast. I was interested to see how far the tail of the comet stretched. On this image I have marked the star 45 Herculis. The separation between the head of the comet and this star is, by my calculation, 10.5 degrees. I can faintly see the tail stretching beyond this and by my measurement this makes the tail at least 12.2 degrees long.

Files associated with this observation

C2023_A3_20241018_1824_Duncan_Hale-Sutton_16x10s_inverted.jpg (571.4 kB)

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James Weightman

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