Double Mutual Event of Jupiters Moons
Taken by Shiraishi on January 17, 2015 @
Kumagaya-shi, Saitama, Japan
Click photo for larger image
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: Unavailable
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Details:
Double mutual events of the Galilean moons of Jupiter.
At night on January 17, the two pairs of Io-Europa and Ganymede-Callisto swap their apparent positions.
There occurs two mutual events that Ganymede occults Callisto partially and that Europa eclipses Io partially by umbra, sequently during 23:20-23:40 (UTC+9).
Io turns back at the westmost position of its orbit to far side.
Europa goes to west in near side, eclipsing Io.
Ganymede also goes to west in near side, occulting Callisto.
Callisto goes to east in far side.
In this photo, upper is west and lower is east.
Nikon COOLPIX P510 digital camera (no telescope); ISO 800, F5.9, 1/10s exposure, f=1000mm (all photos), trimmed and rotated.
Photographer's website:
No URL provided.
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