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An asteroid moving in the ecliptic is seen with coordinates x = 1.2 AU and y...

An asteroid moving in the ecliptic is seen with coordinates x = 1.2 AU and y = 0.8 AU moving at a speed of 20 km s-1 along a direction making a counter-clockwise angle of 55 degrees with the x-axis. What are the semi-major axis and eccentricity of its orbit? Is it an Earth-crossing asteroid?

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