Asteroid 22815, Sewell, was discovered on September 7, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research (LINEAR) Team at Socorro, New Mexico. It has a period of 3 years, 212 days.

It was named for Clarkston, Michigan middle-schooler Michael T. Sewell (born 1993), a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC).

The meaning of asteroid Sewell seems to be: taking a downturn or bad turn, need for or lack of or advocacy for humane treatment.<

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