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AR2808 & AR2809 | March 14th 2021


MalVeauX

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Heya,

AR2808 is an interesting region, in HA it has a nice extensive plage and has filaments between the poles, but in the photosphere it's a tiny pore with not much else to see. Mean while, a smaller region that is now AR809 emerged and has a much smaller HA representation with a tiny plage and the poles are close together, yet in the photosphere it has a much bigger spot that is developing rapidly this morning (maybe it will grow larger and the poles separate a bit more to become a bigger region). It's a really great representation of the difference between the chromosphere and photosphere, and how there's always something to see in HA!

The HA is high contrast by stacking two 1.7A blocking filters (from Apollo Lasky) with a single etalon to produce nearly double-stack performance in terms of suppressing the parasitic continuum.

 

Colored:

 

AR2808_HA_120mmF10_290MM_81frames_PSTEtalon_17ABFX2_Colored_03142021

 

AR2808_HA_120mmF10_290MM_81frames_PSTEtalon_17ABFX2_Colored_Inverted_03142021

 

AR2809_HA_120mmF10_290MM_81frames_PSTetalon_17ABFX2_Colored_03142021

 

AR2809_HA_120mmF10_290MM_81frames_PSTetalon_17ABFX2_Colored_Inverted_03142021

 

Proms_01_HA_120mmF10_290MM_81frames_PSTetalon_17ABFX2_Colored_03142021

 

Proms_01_HA_120mmF10_290MM_81frames_PSTetalon_17ABFX2_Colored_Inverted_03142021

 

Proms_02_HA_120mmF10_290MM_81frames_PSTetalon_17ABFX2_Colored_03142021

 

Proms_02_HA_120mmF10_290MM_81frames_PSTetalon_17ABFX2_Colored_Inverted_03142021

 

AR2808_610nm_Photosphere_120mmF10_290MM_81frames_Colored_03142021

 

AR2809_610nm_Photosphere_120mmF10_290MM_81frames_Colored_03142021

 

 

Timelapse (3 minutes real time) of AR2808:

 

AR2808_HA_120mmF10_290MM_81frames_TimeLapse_3minutes_03142021.gif.e0cdc26ff9729cabd762be681757cfe8.gif

 

Seeing:

 

SeeingConditions_03142021.thumb.jpg.608b9abee7e37a002caa3e972e82684f.jpg

 

Equipment:

120mm F10 Refractor
Internal Subaperture D-ERF, 50mm Baader Red CCD-IR Block filter (in focuser)
PST etalon + two 1.7A blocking filters (from Apollo Lasky) stacked, one tilted in a Skybender
IMX290 sensor (170 FPS)

 

Solarsetup_03142021.jpg.e44ebd69f23ba00dbeb4f96f43607255.jpg

 

Very best,

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