70 years (190 BC–120 BC)
Regarding this, when did Hipparchus die?
Also Know, where did Hipparchus die? Rhodes, Greece
Similarly, when did Hipparchus live?
What did Ptolemy say about Hipparchus?
The Greek astronomer Hipparchus (second century B.C) is credited with introducing numerical data from observations into geometric models and discovering the precession of the equinoxes. Little of his work survives, but Ptolemy considered him his most important predecessor.