Where the Sun never sets: Solar insolation at the poles of Mercury

Details Where the Sun never sets: Solar insolation at the poles of Mercury Where the Sun never sets: Solar insolation at the poles of Mercury

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992amjph..60.1040s&link_type=abstract

American Journal of Physics, Volume 60, Issue 11, pp. 1040-1043 (1992).

Physics

Mercury, Celestial Mechanics

Scientific paper

Since the planet Mercury's axis of rotation is perpendicular to the plane of its orbit, there exist regions at the north and south poles that are permanently in sunshine. This paper calculates the shape and size of these regions if Mercury were a perfect sphere. The eccentricity of Mercury's orbit, combined with its 2:3 spin-orbit coupling result in these regions having a noncircular shape. They have a length of 60 km, a width of 48 km, and an area of 2146 km2.

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