(27981) 1997 UK21 is a main-belt minor planet. It was discovered through the Beijing Schmidt CCD Asteroid Program at the Xinglong Station in the Chinese province of Hebei on October 20, 1997.[1] It is usually about 2.72 AU away from Earth and has an orbital period of 14.6 Julian years.
http://www.wolframalpha.com/entities/minor_planets/27981_%281997_uk21%29_minor_planet/13/1i/kh/
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