AR2758 & Proms | High Res | HA & CaK | March 13th 2020

[MalVeauX]

Heya,

Lucky Friday the 13th perhaps? Woke up to a clear sky and excellent seeing conditions which allowed me to get some data in high res, and some lower image scale data to get some different compositions. AR2758 is winding down and approaching the limb to leave our sight, but it lasted quite a while! Only a few small prominences on the limb, but at a fine image scale, even they become large interesting structures. I was able to get AR2758 and the limb with proms and spicules in a fine image scale with sub-arc-second seeing conditions this morning with my C8 Edge + Aries D-ERF. The lower image scales were captured with my 120mm F10 refractor in HA & CaK. The convection cells were captured under very good seeing conditions with my test-bed Solar Newtonian, which is a 8" F6 Quartz newtonian with a simple, affordable, Baader ND3.8 photographic solar film filter in an aluminum cell and used an Edmund Optics 430nm Gband filter at F12 with a 290MM sensor to capture high res convection cells at 0.25"/pixel under sub-arc-second seeing conditions. This newtonian setup is centered around high resolution photosphere structures, so the cells and as the maximum returns, the sunspots.

High Res, Colored:

Lower Res, Colored:

High Res, B&W:

Lower Res, B&W:

Seeing Conditions (Sub-arc-second sustained quite often, was excellent):

Equipment:

120mm F10 Frac + Baader CCD-IR Block Red (D-ERF) + PST etalon + 10mm BF + ASI290MM (partial HA disc)
120mm F10 Frac + Baader CCD-IR Block Blue (D-ERF) + Lunt CaK B1200 + ASI290MM (partial CaK disc)
C8 Edge + Aries D-ERF + Baader CCD-IR Block Red (D-ERF) + PST etalon + 10mm BF + ASI290MM (high res HA)
200mm F6 Quartz Newtonian + Baader ND3.8 Solar Film + 2x Barlow + Edmund Optics 430nm Filter + ASI290MM (high res cells)

Very best,

[michael.h.f.wilkinson]

That is a superb collection!

[Pete Presland]

Fabulous standard of images as always, particularly the high resolution cell structure!

[richard ashbee]

Great set of images