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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Sun - 28.6.2020 at 09.36 Hyvinkää Observation number 91576

Visibility IV / V

Timo Inkinen, Ursa (Etelä-Suomi)

A reasonably impressive protuberance photographed from the Sun on June 28, 2020 at 9:36. The imaging tube is the familiar TMB 152/1200 APO lens tube combined with Daystar Quark Chromosphere Combo + Baader D-ERF filters and a Televue 4x PowerMate teleconverter. The occurrence of protuberances varies from day to day, so usually there is always something to describe in that Ha area. The picture can also be found on my website .

I added to the observation a raw image of the outbreak of a group of sunspots seen at the same time, which then neither became a more permanent group of spots on the surface of the Sun. (I haven't dealt with that as a final image.) There was more detailed information about that comma company on the SpaceWeather page at the time.


Additional information
  • Observation target
    • Sun
    • Näyttävä
  • Seeing
    • Good
Technical information

Captured with the ZWO ASI 183MM Pro camera as 16-bit SER video from which only 4% (226 frames) of the captured video frames have been extracted. Image processing in AutoStakkert 3 and PhotoShop.

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