Page 383 - 89 history of astronomy_opt
P. 383
over a limited arc of its orbit, before Jupiter
approached the sun, Mr. Cowell computed
a retrograde orbit and calculated the fu-
ture positions of this satellite, which en-
abled Mr. Melotte to find it again in the
autumn–a great triumph both of calcula-
tion and of photographic observation. This
satellite has never been seen, and has been
photographed only at Greenwich, Heidel-
383
