AR2758 HA & CaK | March 11th 2020

[MalVeauX]

Heya,

I had decent seeing this morning, around 1.2~1.4", so was able to capture some interesting bits in AR2758 in HA & CaK. Seeing dropped rapidly after that, just after 11am Eastern Time as my mid-day seeing started to become apparent. The sunspot is gone, AR2758 no longer has a visible umbra really, but the activity in the chromosphere both in HA & CaK is still quite lively with things to see.

Colored:

B&W:

Earth Scales:

Equipment:

120mm F10 Frac
Baader Red CCD-IR Block (Internal D-ERF) + PST Etalon + 10mm BF + ASI290MM (Ha)
Baader Blue CCD-IR Block (Internal D-ERF) + Lunt CaK B1200 + ASI290mm (CaK)
ED80 Frac
Baader Red CCD-IR Block (Internal D-ERF) + SM60II DS + PST Etalon + 10mm BF + IMX183 (Ha disc)
Baader Blue CCD-IR Block (Internal D-ERF) + Lunt CaK B1200 + IMX183 (CaK disc)

Very best,

[Pete Presland]

A beautiful set of images, particularly the arching Prom!