Background
Calandrelli was born on May 22, 1749, near Rome, Italy.
Giuseppe Calandrelli
Piazza della Pilotta, 4, 00187 Roma RM, Italy
Pontifical Gregorian University
Astronomer mathematician professor
Calandrelli was born on May 22, 1749, near Rome, Italy.
In 1768, under Cardinal Flavio Chigi, Calandrelli completed the course of philosophy and was ordained a priest.
Calandrelli was professor of mathematics at the Gregorian University of the Jesuit-run Collegio Romano in Rome and director of the observatory that he had built there in 1787. The thin square tower that he used as an observatory (which was replaced by the observatory built by Angelo Secchi) may still be seen.
Calandrelli confined himself exclusively to positional astronomy and, in collaboration with his codirectors, Andrea Conti and Giacomo Ricchebach, he published the series Opuscoli Astronomici (1803-1824). Those of 1806, dedicated to Pope Pius VII, include Osservazioni e riflessioni sulla parallasse annua delTa alfa della Lira and Soluzione esatta del problema delle altezze corrispondenti. In 1816, again in collaboration with Conti and Ricchebach, Calandrelli published the Tavola delle parallassi di altezza di longitudine e di latitudine, also dedicated to Pius VII, who had become so keenly interested in the work that he provided the observatory with “perfect machines,” among them the transit of Reichenbach. Calandrelli also wrote historical articles on the Gregorian calendar and on Roman astronomy.
In 1815 Calandrelli was relieved of teaching commitments and devoted himself entirely to studies, until 1824, when the Roman College turned into the Society of Jesus. He retired to the seminary of Sant'Apollinare, where he died on Christmas night in 1827 due to an inflammatory disease. His remains rest in the church of Sant'Apollinare.
Ignazio Calandrelli was an Italian mathematician and astronomer.
