New Cycle 25 AR & Prom | HA, CaK | March 18th 2020

[MalVeauX]

Heya,

Woke up really late today, was cloudy, but managed to go outside very late afternoon when my seeing is the poorest. I managed to work through some 2~3 arc-second seeing as there were tiny moments of 1.2~1.5 arc-second seeing here and there, so I stayed in that range to try and get data at courser image scales. The new cycle 25 AR (maybe AR2759 if it progresses?) has some visible pores in the photosphere and a lovely plage with filament activity in the chromosphere, with a great prominence right on the limb next to it.

Colored:

B&W:

Seeing Conditions (SSM; poor for my location today, mid-day, at its worst):

Equipment:

120mm F10 Frac + Baader Red CCD-IR Block (internal D-ERF) + PST Etalon + 10mm BF + ASI290MM (HA disc)
120mm F10 Frac + Baader Blue CCD-IR Block (internal D-ERF) + Lunt CaK B1200 Filter + ASI290MM (CaK disc)
120mm F10 Frac + Baader Red CCD-IR Block (internal D-ERF) + Baader 610nm + 3.0 ND Filter + ASI290MM (WL disc)
150mm F16 Frac + Baader Red CCD-IR Block (internal D-ERF) + 2x Barlow + Baader 610nm + ASI290MM (WL finer scale)

Very best,

[Pete Presland]

Very nice set of images, a 2nd cycle 25 spot in a month!

[MarkAR]

Wonderful images, well done.