|Established 1942 (1942)|
unnamed telescope 0.7 m Schmidt
|unnamed telescope 1.0 m reflector|
Phone +52 22222472940
|Location San Andrés Cholula, Puebla, Mexico|
Altitude 2,166 metres (7,106 ft)
Website OANTON OAN - Tonantzintla
Address Luis Enrique Erro, Sta María Tonanzintla, 72840 San Andrés Cholula, Pue., Mexico
Hours Closed today SundayClosedMonday8AM–10PMTuesday8AM–10PMWednesday8AM–10PMThursday8AM–10PMFriday8AM–10PMSaturday8AM–10PMSuggest an edit
Organizations National Institute of Astrophysics, Optics and Electronics, National Autonomous University of Mexico
Similar National Astronomical Observatory, Large Millimeter Telescope, Cholula, Sierra Negra, Great Pyramid of Cholula
Tonantzintla Observatory (Spanish: Observatorio de Tonantzintla) is an astronomical observatory located in the municipality of San Andrés Cholula in the Mexican state of Puebla. It consists of two adjacent facilities: the National Astrophysical Observatory of Tonantzintla (Spanish: Observatorio Astrofísico Nacional de Tonantzintla - OANTON), operated by the National Institute of Astrophysics, Optics and Electronics (INAOE), and the National Astronomical Observatory - Tonantzintla (Spanish: Observatorio Astronómico Nacional - Tonantzintla—OAN - Tonantzintla), operated by the National Autonomous University of Mexico (UNAM). OANTON is located on the INAOE campus, which includes numerous other buildings. OAN - Tonantzintla is located immediately to the east on mostly unused property. The observatory is located 11 kilometres (6.8 mi) west of Puebla and 33 kilometres (21 mi) east of Popocatépetl, eruptions of which sometimes interfere with observing.
National Astrophysical Observatory of Tonantzintla
OANTON was dedicated in February 1942 in a ceremony attended by the President of Mexico, Manuel Ávila Camacho, and other dignitaries. The project was begun some time earlier by Luis Enrique Erro, who was an astronomer by training but for many years had been the Mexican ambassador to the United States. In 1954 Guillermo Haro became the director of OANTON, and in 1971 the observatory became INAOE under his direction. In the same year INAOE began building a new observatory in Cananea, Sonora, which is now called Guillermo Haro Observatory.
National Astronomical Observatory - Tonantzintla
OAN - Tonantzintla was established in 1948, when observing conditions at the OAN location in Valley of Mexico became too degraded by light pollution to be useful. OAN was first established on the balcony of Chapultepec Castle in Mexico City in 1878. It was moved to Tacubaya, then on the outskirts of the city, to a building that was started in 1884 and completed in 1909. OAN completed the next move to Tonantzintla in 1951. By the mid-1960s, the night sky over the observatory became so polluted that research was hampered. OAN began looking for a new location 1966, and determined that Sierra San Pedro Martir would be an excellent site. The first telescope at the new observatory was installed in 1969 using a mirror polished by OANTON and UNAM.