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  • Shelby Bullion

The Sky Tonight Update: Mercury at Greatest Eastern Elongation


mercury at greatest eastern elongation

The planet Mercury reaches greatest eastern elongation of 18.4 degrees from the Sun. This is the best time to view Mercury since it will be at its highest point above the horizon in the evening sky. Look for the planet low in the western sky just after sunset.


When an inferior planet is visible after sunset, it is near its greatest eastern elongation. When an inferior planet is visible before sunrise, it is near its greatest western elongation.

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