Sun - transequatorial complex of ARs
Taken by Alessandro Ravagnin on May 6, 2026 @
Italy - Romano d'Ezzelino
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Details:
The sequence was assembled from daily spectroheliographic observations acquired from my backyard observatory in Italy using a Tecnosky 115/800 mm refractor, an SHG700 spectroheliograph, and a ZWO ASI183MM camera. Each full-disk image was reconstructed from spectral scans in the H-alpha line and then carefully aligned, photometrically normalized, and corrected for instrumental gradients to create a homogeneous time-lapse.
The animation reveals the evolution of a remarkable transequatorial magnetic system connecting multiple NOAA active regions across both solar hemispheres. As the days pass, filaments, plages, and sunspot groups continuously evolve while the entire complex is carried across the visible solar disk by solar rotation.
One particularly striking feature is the gradual deformation of the largest filaments caused by the Sun's differential rotation. Since different latitudes rotate at different angular velocities, long chromospheric structures slowly twist and change shape over time, providing a direct visual demonstration of the dynamic nature of the solar magnetic field.
The complete observing campaign was also used to produce heliographic maps of the chromosphere covering the entire Carrington Rotation 2310. Comparison with GONG and Solar Dynamics Observatory (SDO) data confirmed the reliability of the reconstructed large-scale structures.
Credit & Copyright: Alessandro Ravagnin (ADAM Observatory), Italy.
Photographer's website:
https://astrotrex.wordpress.com/2026/06/07/chasing-the-sun/#english
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