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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Grimaldi - 2.12.2020 at 01.53 Kauhava Observation number 95076

Visibility III / V

Jari Kankaanpää, Lakeuden Ursa

Grimald's pool in full moon shadless lighting conditions. The dark flooded area in the middle is about 100km in diameter. In good conditions, it appears as a dark spot on the left (west) edge of the full moon, even with the naked eye. The light ring indicates the approximate location of the inner curb. Its diameter is about 170km.

Additional information
  • Observation target
    • Moon surface feature
  • Name of the observation target
    • Grimaldi
    • Keskitaso
  • Seeing
    • Good
Technical information

Meade 12 SCT, 3X Barlow, Case ZWO 174mm & Ir-longpass filter.

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