No material advance was made on Ptolemy's instrument until Tycho Brahe, whose elaborate armillary spheres passing into astrolabes are figured in his Astronjmiae Instauratae Mechanica.
Tycho Brahe, Astronomiae Instauratae Mechanica; M.
117-138), but sometimes, and wrongly, attributed to Tycho Brahe, who catalogued twelve stars in Aquila and seven in Antinous; Hevelius determined twenty-three stars in the first, and nineteen in the second.
It is also a constellation, mentioned by Eudoxus (4th century B.e.) and Aratus (3rd century B.C.), and catalogued by Ptolemy, 25 stars, Tycho Brahe 25, and Hevelius 38.38.
Ptolemy catalogued 38 stars, Tycho Brahe 42 and Hevelius 62.62.