Observation by Nick James: C/2025 A6 (Lemmon)

Uploaded by

Nick James

Observer

Nick James

Observed

2025 Oct 09 - 04:30

Uploaded

2025 Oct 09 - 06:45

Objects

C/2025 A6

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Constellation

Ursa Major

Field centre

RA: 10^h54^m
Dec: +42°24'
Position angle: +2°12'

Field size

3°09' × 2°16'

Equipment

72mm, f/4.8 refr. + ASI294MC

Exposure

20x60s

Location

Chelmsford

Target name

C/2025 A6 (Lemmon)

Title

C/2025 A6 (Lemmon)

About this image

This widefield colour image was taken at the same time as the narrow field animation here. The ion tail is pretty bright now considering how bright the sky was this morning. I get a total magnitude of 6.0 using comphot. The comet will be 2-3 mags brighter at its peak later this month and there will be no Moon so it should be a pretty spectacular imaging target.

It is moving very fast against the star background now so it is important to keep exposures short to avoid trailing, and to avoid saturating the inner coma.

Files associated with this observation

2025a6_20251009_043001_ndj.jpg (2.3 MB)

Like this image

Nick Quinn, Dominic Ford, Peter Mulligan

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