Solar Activity 20 Aug

[brianb]

Damp overcast cleared mid morning leaving broken cloud in a strong, warm breeze. Not a lot happening on the disc

0956 UT. Coronado PST CaK, prime focus, DMK41

but lots of bright prominences

1002 UT. Solarscope 60, 0.5x focal reducer, DMK41 - "one shot" with differential prom/surface processing

Close ups of the prominences, going clockwise round the disc, all with Solarscope 60, 2.5x Powermate, DMK21:

1008 UT

1009 UT

1010 UT

1011 UT

1013 UT

1015 UT

In the south east, AR 11100 remains active, though there is only a small spot which might have been visible in white light with better seeing. There are interesting filaments developing in this region too.

1049 UT. Lunt 60mm, B1200 CaK diagonal, 2.5x Powermate, DMK21

1040 UT. Solarscope 60, 2.5x Powermate, DMK41

Transparency very good but with some drifting cloud. Seeing moderate to start with but rapidly deteriorating, rapid boiling with increasing amplitude. Temperature 20C, wind SW force 5-6 gusting 7.

[NickH]

Great to see as ever Brian

[Solar B]

Very Good Series there Brian

Brian

[sheri_barri]

Excellent to see the sun in CaK on this day. Nice work!