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Ursa Astronomical Association

Moon - 21.3.2021 at 17.40 Tampere Observation number 97188

Visibility II / V

Pekka Rautajoki, Tampereen Ursa

The Moon of the Bongaa 100 Challenge as seen in the day sky ( #12) with binoculars, and at the same time also the object #13, Moon at an angle. The second image shows both the Moon and the Sun on the low horizon. The moon was about 52 degrees lower at the time of the drawing, and the Sun was 46 degrees lower. The illuminated side of the moon still points a little upward from the observer's point of view - so the moon would seem to be quite oblique to the direction in which the Sun is! #bongaa100

Additional information
  • Observation target
    • Moon
    • Heikosti näkyvä
Technical information

Binoculars: Canon 15x15 IS. Drawing: Derwent and Conte crayons, Cretacolor white pen on blue paper. Photo: iPhone 11 Pro Max panorama.

Comments: 2 pcs
Mikko Peussa - 28.3.2021 at 22.38 Report this

Tuota "näköharhaa" ihmetellään joskus muuallakin :)

Kauempaa jos katsoisi Maata ja Kuuta, niin valaistunut osa olisi ihan yhtä kallellaan ja samassa asennossa molemmilla. Sen verran kaukana on Aurinko, että valo tulee käytännössä yhdensuuntaisesti molempiin kohteisiin.

Anne Liljeström - 31.3.2021 at 13.18 Report this

Ai että on muuten hieno kuva tästä ilmiöstä!

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