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Ursa Astronomical Association

Sun - 18.5.2022 at 14.52 Kirkkonummi, Porkkala Observation number 106851

Visibility V / V

Ben Kalland, Ursa (Helsinki)

The sun is active again. The figure shows 8 named active areas, the largest being AR3014 in the upper left corner. When exposed in this way, the protuberances do not show up properly, but the filaments stand out lighter against the surface. Lunt 80, 560 mm, DS, stack of 250 images.

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  • Observation target
    • Sun
Comments: 2 pcs
Tapio Lahtinen - 19.5.2022 at 20.09 Report this

DS tarkoittaa ilmeisesti tuplastäkkäystä. Millä kameralla saat koko auringon mahtumaan ?

Ben Kalland - 20.5.2022 at 06.52 Report this

Kyllä, DS tarkoittaa double stack. Kamera on ASI183 MM, sillä saa tällä polttovälillä koko auringon mahtumaan, hieman alisämplattynä (f/7 kun ihanne tälle sensorille voisi olla f/8-9)

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