Asteroid 5081, Sanguin, was discovered on November 18, 1976 by the Felix Aguilar Observatory team at the El Leoncito Station near Barreal, San Juan, Argentina. It has a period of 3 years, 194 days and is 15.44 kilometers (about 9 3/5 miles) in diameter.

It was named for Juan Sanguin (1933-2006), an Argentinian astronomer who was in charge of the minor planet and comet programs at the El Leoncito Station for more than a quarter of a century.

The meaning of asteroid Sanguin seems to be what its name might suggest: sanguine; sanguinary; blood, blood drawn.

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