Images taken with Lunt LS60 or Lunt LS100 in single stack or double stack mode as indicated near the image. Using native focal length for full disk and 2/5x or 3x barlow lens for prominence and surface detail.
Recording with ASI174. Typically 10% to 20% of 750 / 1000 / 2000 / 5000 frames stacked in AutoStakkert!3 wavelet sharpening in Registax 6 and finishing in Photoshop CS2.
Time-lapse videos with Python script and ffmpeg.
2021-02-21 19:52UT. there were several days of nice sunny weather but not much activity again on the Sun. Today there was one interesting location near the Sun's limb where a filament extended across the edge of the solar disk and became a prominence. The image shows the filament as an absorption feature of hydrogen gas over the disk and then as emission beyond the limb. We also see the limb of the Sun where the sharp defined edge is the photosphere with the somewhat transparent chromosphere on top.
2021-01-31 19:44UT. A break in the rainy weather allowed for the first observation of the 2021 campaign. The seeing was not as bad as expected and there were two nice prominences to see. As an experiment the image composite on the right shows the solar disk as positive and the back ground prominences as negative. perhaps this brings out some faint prominence structures?
|Prominences background as positive||Prominences background as negative|
The two prominences in detail.
Copyright images and processing Gert Gottschalk.
Copyright Bilder und Verarbeitung Gert Gottschalk
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