British Astronomical Association
Supporting amateur astronomers since 1890

BAA Images Peter Meadows

Observation by Peter Meadows: Latest Butterfly Diagram

Uploaded by

Peter Meadows


Peter Meadows


2020 Jan 12 - 17:44


2020 Jan 12 - 17:49


The Sun

  • 80mm refractor & eyepiece projection
Target name



Latest Butterfly Diagram

About this image

Over the last 3 weeks there have been four new cycle sunspot groups at high latitudes north and south of the solar equator.  So perhaps cycle 25 has really begun!  The diagram shows the location of observed sunspots groups since 2008 (the different colours indicate the maximum size of each group (yellow less than 100 millionths of the Sun's visible hemisphere (MSH), green between 100 and 500 MSH, purple between 500 and 1000 MSH and red greater than 1000 MSH)).

Files associated with this observation
Like this image
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.