| Transit Of Mercury From Mars |
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Transits of Mercury from Mars are much more common than Transits Of Mercury From Earth : there are several per decade. No one has ever seen a transit of Mercury from Mars, but they could be observed by hypothetical future Mars colonists. In theory, the Mars Rovers '' across the Sun, but at 2' Angular Diameter , Deimos is about 20 times larger than Mercury's 6.1" angular diameter. Ephemeris data generated by JPL Horizons indicates that ''Opportunity'' would be able to observe the transit from the start until local sunset at about 19:23 UTC Earth time, while ''Spirit'' would be able to observe it from local sunrise at about 19:38 UTC Earth time until the end of the transit. The Mercury-Mars Synodic Period is 100.8882 days. It can be calculated using the formula 1/(1/P-1/Q), where P is the Orbital Period of Mercury (87.969 days) and Q is the orbital period of Mars (686.98 days). The Inclination of Mercury's orbit with respect to Mars' Ecliptic is 5.16°, which is less than its value of 7.00° with respect to Earth's ecliptic.
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