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Ursa Astronomical Association

Partial solar eclipse - 10.6.2021 at 14.09 - 10.6.2021 at 14.32 Espoo Observation number 98899

Visibility IV / V

Tommi Ropponen, Ursa (Etelä-Suomi)

Partial eclipse photographed in Espoo. The vibration of the atmosphere was quite intense in the afternoon, so the quality of the images is not quite what it could have been in the event of an eclipse, for example in the morning. I photographed the hydrogen alpha first from the courtyard of the apartment building (Figures 1, 2, 4, and 5) and then quickly afterwards in white light (Fig. 3).

A few different treatments are shown in the pictures. There was a bit of artifact left on the moon disk, but you have to watch if you could handle these files on a rainy day.

AR2829 and AR2832 as active regions in the disk.

Update 6/13/2021: Changed Figures 1 and 2 to slightly better processed versions where the "glow" outside the solar disk is set to be slightly more moderate. An added animation has been added, but the quality without the tracking stand is not quite diamond right now. However, it shows the development of minds everywhere.

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Additional information
    • Osittainen auringonpimennys
  • Eclipse type
    • Partial solar eclipse
Technical information

Hydrogen alpha equipment: Baader D-ERF / Sharpstar EDPHII / Daystar Quark / Daystar shortener / ASI174mm with manual Alt-Az stand without monitoring. The image of the more complete phase is stacked with the top 30 percent of a total of 3,182 squares. The second image is stacked in the top 40 percent of a total of 3,860 squares. Shooting at about 160 FPS. White light equipment: Baader AstroSolar / SEL200600G / SEL20TC / Sony A7iii with manual Alt-Az stand without monitoring. The picture shows the best 60% stacked out of a total of 298 squares.

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