FILE 08 / 12 · EVIDENCE RECORD
ev-1883-bonilla
447 Objects Crossed the Sun
Bonilla’s Procession · Zacatecas, 1883
Hundreds of dark objects crossed the Sun before powered flight
In the research record
On August 12 and 13, 1883, José Árbol y Bonilla was observing the Sun from Zacatecas Observatory in Mexico when dark objects began crossing the telescope's field. During three hours and twenty-five minutes of clear observing time spread across the two days, he counted 447 passages. Some objects appeared sharp. Others were surrounded by haze. Bonilla photographed part of the procession and reported it in L'Astronomie in 1886.
Bonilla did not assign the objects a settled cause. An editorial note published with the report suggested birds, insects, or dust passing close to the telescope. In 2011, researchers proposed a very different possibility: fragments of a comet passing close to Earth, with their distance estimated from the difference between what Bonilla saw in Zacatecas and what other observatories did not report. That interpretation remains a preprint hypothesis, not a confirmed reconstruction.
The modern analysis works from the reproduced images and written account published in L'Astronomie. No original plate has been identified in the sources used here. The observation survives. Its distance, scale, and cause do not.
What this adds
Long before satellites or aircraft, an astronomer recorded hundreds of objects crossing the Sun in a few hours. The record contains the count, the drawings, and the photographs. It does not contain an agreed answer.
Status: published historical observation; modern fragmented-comet interpretation at preprint level. Bonilla's report and published reproductions survive. The objects' identity and distance remain unresolved, and the status of any original photographic material has not been established by the sources collected here.
In the novel
In Chapter 15, Bonilla marks the moment the archive acquires photographs. José Árbol y Bonilla records hundreds of dark objects crossing the Sun in 1883, then publishes the images and observing log three years later. The novel gives the modern fragmented-comet interpretation its full status: a preprint built from surviving reproductions, neither confirmed nor refuted. The physical record enters the lens alongside a proposed natural explanation that is itself an extraordinary near-Earth event.
| Source | Status | Role |
|---|---|---|
| Árbol y Bonilla, José. “Passage sur le disque solaire d’un essaim de corpuscules, vu à l’observatoire de Zacatecas (Mexique).” L’Astronomie (1 January 1886): 347–350.SOURCE ↗ | Historical record | historical record |
| Durand Manterola, Héctor Javier, María de la Paz Ramos Lara, and Guadalupe Cordero. “Interpretation of the Observations Made in 1883 in Zacatecas (Mexico): A Fragmented Comet That Nearly Hits the Earth.” arXiv:1110.2798 (2011).arXiv:1110.2798 | Preprint | modern interpretation |