Observation by Steve Brown: Comet C/2025 A6 (Lemmon)

Uploaded by

Steve Brown

Observer

Steve Brown

Observed

2025 Oct 05 - 04:43

Uploaded

2025 Oct 06 - 20:06

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: 10^h09^m
Dec: +41°29'
Position angle: -50°54'

Field size

1°59' × 1°07'

Equipment

Canon 250D
Evostar 72ED
Star Adventurer

Exposure

35x 15s exp, 420mm fl, f/5.8, ISO-3200

Location

North Yorkshire, UK

Target name

C/2025 A6 (Lemmon)

Title

Comet C/2025 A6 (Lemmon)

About this image

I managed to capture comet C/2025 A6 (Lemmon) successfully on the morning of 2025 October 5, despite the passing cloud and strong gusts of wind. The comet was not visible to the naked eye but I could see it using 8x40 binoculars. It appeared as a diffuse white blob and I couldn't see a tail. Imaging captured it much better and revealed the green colour, with a hint of a tail too. I tried various exposure times and a stack of 15 second shots gave the best results.

Files associated with this observation

Comet C-2025 A6 (Lemmon) at 04.43 UT on 2025-10-05.jpg (2.7 MB)

Like this image

Dominic Ford, Callum Potter

Comments

Nick James, 2025 Oct 07 - 06:57 UTC

Steve - Good that you are making visual observations of this comet. You might like to try making a magnitude estimate using your binoculars. Details of how to do this are in the Comet Section Observing Guide.

Steve Brown

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.