  In 1883, on the 12th and 13th of August, Mexican astronomer Jose A. y Bonilla
observed several objects passing in front of the solar disk. In 1886 in the
L'Astronomie magazine, he reported his observations without providing a
hypothesis explaining the registered phenomena. Our objective in this work is
to interpret, with current knowledge, what he observed in Zacatecas. Our
working hypothesis is that what Bonilla observed in 1883 was a highly
fragmented comet, in an approach almost flush to the Earth's surface. The
fragmentation of the comet's nucleus is a phenomenon known since the XIX
century. Using the results reported by Bonilla, we can estimate the distance at
which the objects approach to the Earth's surface, their size, their mass and
total mass of the comet before fragmentation. According to our calculations,
the distance at which the objects passed over the Earth's surface, was between
538 km and 8,062 km, the width of the objects was between 46 m and 795 m and
its length between 68 m and 1,022 m, the object's mass was between 5.58e8 kg
and 2.5e12 kg. Finally, the mass of the original comet, before fragmentation,
was between 1.83e12 and 8.19e15 kg, i.e., between 2e-3 and 8.19 times the mass
of Halley Comet.
