Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005asuai...3...30s&link_type=abstract
Astronomia. La rivista dell'Unione Astrofili Italiani (ISSN 0392-2308), N. 3, p. 30 - 32 (maggio-giugno 2005)
Astronomy and Astrophysics
Astronomy
History Of Astronomy, Multiple Stars
Scientific paper
The multiplicity of Spica's system has been first observed in 1753 by the dominican father Giovanni Battista Audiffredi through a lunar occultation. Audiffredi noted that the emersion's duration from the bright lunar limb was not instantaneous. Nowadays Spica has five known components, four of them have been discovered by occultation. This observation is presented along with a general introduction of lunar occultations, Watts' profiles, Cassini regions and grazes.
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