Low Moon of Autumn
Taken by Alan Dyer on October 3, 2019 @
Near Gleichen, Alberta
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Camera Used: Canon Canon EOS R
Exposure Time: 6/1
Aperture: f/8.0
ISO: 100
Date Taken: 2019:10:03 20:43:45
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Details:
Here's a composite image depicting the path and position of the low waxing crescent Moon of autumn across the southwest evening sky over four nights, Sept 30 to Oct 3, 2019. The ecliptic — the blue line — is always low in the sky at this time of year in the Northern Hemisphere, placing the Moon and planets low as well in the evening twilight.
This was shot from my home in southern Alberta at latitude 50° N. Earthshine is just visible on the dark side of the Moon in the later images.
The base panorama image of the sky and landscape is from Oct 1, which also provides the Moon image second from the right. The Sept 30 (to the right), Oct 2 and Oct 3 moons (to the left) are added in with separate exposures taken from exactly the same spot and with the same camera and lens on the other nights, with those images layered and masked into the Oct 1 sky.
The Moon positions are close to the actual positions relative to the horizon and to Jupiter, bright at left. The ecliptic line looks straight but is actually a shallow curving arc. The ecliptic line is correctly placed below the Moon, as the Moon's path does not coincide with the ecliptic but is tilted 5° to the ecliptic and it was above the ecliptic on these nights, but approaching it and crossing the ecliptic on Oct. 4. Jupiter, however, is on the ecliptic.
Antares and the stars of Scorpius are also visible in the deep twilight.
Photographer's website:
https://www.amazingsky.net
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