Observation by John Arnold: H-alpha activity in AR4226

Uploaded by

John Arnold

Observer

John Arnold

Observed

2025 Sep 30 - 09:37

Uploaded

2025 Oct 01 - 10:34

Objects

The Sun

Equipment

Lunt Ls50THa with eyepiece projection and ASI178MM camera

Exposure

exp.time 0.66 msec. Each frame of animation is a stack of 200 frames from 2000-frame video (lasting 9.1 sec), with 10-second intervals between successive videos

Location

Suburban North Leeds

Target name

AR4226

Title

H-alpha activity in AR4226

About this image

Animation spans 8 minutes, before being curtailed by clouds

Files associated with this observation

2025-09-30-0937-0945 AR4226.gif (1.3 MB)

Like this image

Anton Matthews, Dominic Ford, Nicholas Freeman, Andy Wilson

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.