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Speaker |
Sigismondi, Costantino |
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Coauthors |
Alexandre Humberto Andrei, Sérgio Boscardin, Jucira Lousada Penna |
| Talk Title |
The Mira of Secchi at Pincio and its concepts reused at the Observatorio Nacional in Rio de Janeiro |
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Abstract |
Every observatory has a sighting scope and a target to align down to an arcsecond the axis of a telescope. Secchi located at 1.39 Km from the Collegio Romano Observatory his target whose dimensions of 4x7 cm are a standard like for atmosphere, as the Secchi disks are for marine water. In Rio de Janeiro a similar mira (target) was setup to calibrate the reflecting heliometer in daylight, using also artificial stars made with a metal sphere. This talk will be presented in two parts: in room and on site, during a celebrating walk from Pincio to St. Ignatius churc in occasion of the bicentennial of the birth the evening of July 2nd 2018. |
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Talk view |
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