Nuevo Mercurio is an ordinary (H5) chondrite that fell the evening of December 15, 1978, in Zacatecas, Mexico.
According to the Meteoritical Bulletin (MB 57):
"A bright fireball, traveling NE. to SW. and visible over a radius of at least 200 km, exploded over north-central Mexico and scattered meteorites over an elliptical area more than 10 km in length."
To date, over 300 specimens totaling 50 kg (110 lb) have been recovered.