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

Uploaded by

Nick James

Observer

Nick James

Observed

2025 Oct 12 - 02:38

Uploaded

2025 Oct 12 - 08:58

Objects

C/2025 A6

Planetarium overlay

Enable overlay
Show stars
Label stars
Show deep sky objects
Label deep sky objects
Show constellation boundaries
Show constellation sticks
Show constellation labels
Show RA/Dec grid

Constellation

Ursa Major

Field centre

RA: 11^h37^m
Dec: +42°09'
Position angle: +2°10'

Field size

3°09' × 2°16'

Equipment

72mm, f/4.8 refr. + ASI294MC

Exposure

17x60s

Location

Chelmsford

Target name

C/2025 A6 (Lemmon)

Title

Comet C/2025 A6 (Lemmon)

About this image

Really poor conditions this morning with the Moon and significant haze combining to make the sky very bright. The sky brightness in the comet's field was 15.4 mags per square arcsec! I got a total magnitude of 5.7 but this is bound to be an underestimate given the conditions were so poor. Despite the rubbish conditions it still shows a reasonable tail. Hopefully we'll get some clear, transparent skies over the next couple of weeks when the Moon is gone and it is in the evening sky.

Files associated with this observation

2025a6_20251012_023825_ndj.jpg (2.7 MB)

Like this image

Nick Hewitt, Steve Brown, Callum Potter

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.

Registered charity no. 210769
Registered company no. 117572

For more information including contact details, click here.

Our Terms of Use are here.

Our Privacy Policy is here.