Solar Activity 19 May

[brianb]

Only a short sunny interval this afternoon, with poor transparency (thin high cloud & coastal fog spreading in) and very wobbly seeing. Still better than the forecast greyout!

The solar disk remains quiet. I did not observe in white light but the CaK disk shows fairly clearly that there would have not been much to see.

1342 UT. Coronado PST CaK, prime focus, DMK41

In hydrogen alpha the only significant feature is the prominent filament in the north east, which has elongated & split into two pieces:

1401 UT. Solarscope 60, x2 barlow, DMK41

A full disk shot show just how big this feature is!

1349 UT. Solarscope 60, 0.5x focal reducer, DMK41

This composite shot also shows the distribution of the numerous quiescent prominences scattered round the disk edge. I did manage to cature a couple of these in close up before the mist got too thick.

In the north west, the band of filaments which has been on the disk for a while has now reached the limb:

1407 UT. Solarscope 60, x2 barlow, DMK21

And there is an extensive complex but faintish curtain of prominences on the north east limb:

1405 UT. Solarscope 60, x2 barlow, DMK21

Incidentally I was unable to process these prominence images with Avistack v1.8 due to the variable transparency. Registax v5 was used.

Transparency poor & variable. Seeing bad with substantial boiling. Temperature 18C, falling as coastal fog spread in. Wind N force 1-2 (sea breeze - clouds were drifting from south west to north east).

[Ibbo!]

Very very good under the conditions

I also admit to a little envy, clouded out all day

Hope your clear skies remain

Steve

[kris h]

The picture really does show how big the feature is

the third one is my favorite the red glow looks amazeing

kris h

[Neo_uk]

Great images brian ! i look forward to your daily solar report !

the big worm prom as split now i see......The sun has a mustache !! lol 118 118 !.

chris

[brianb]

Thanks guys!

The sun has a mustache !!

I saw it as eyebrows