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Kidinnu 𐡊𐡃𐡍 | |
|---|---|
| Born | Bābilim, Persian Empire |
| Died | 14 August 330 BCE Bābilim, Macedon |
| Nationality | Chaldean |
| Field of study | Astronomy |
Kidinnu, also known by the Greek name Cidenas, was a Babylonian astronomer. He distinguished between the lunisolar year and tropical year and measured the latter as 365 days, 5 hours, 41 minutes, and 4.16 seconds (the real length is 7 minutes and 17 seconds longer). He also discovered solar precessions.[1]