Lunt 40 Solar Scope, ASI290MM camera, EQ6R mount
Best 750 frames stacked with AutoStakkert3, Registax 6 for wavelets, Photoshop and Microsoft Photo for other post-processing.
Sunspot groups AR2859 (upper part of disk) and AR2860 (lower part of disk) are prominent in this hydrogen alpha image of our Sun. AR2860 has already unleashed a large solar flare. Plages, filaments and prominences are also present in this image.