Ibn Yunus' Hakimi Zij
Zij Hakimi y observaciones de eclipses de Ibn Yunus
- Date
- 1007 · confidence high
- Place
- Cairo, Egypt
- Credited to
- Ibn Yunus
- Field
- Cosmos & Earth
What was discovered
Astronomical tables compiled from 30 years of observation in Fatimid Cairo, with highly precise records of eclipses and conjunctions. His eclipse data were used in the 19th century to measure the secular acceleration of the Moon.
What it led to
- prayer-time tables for Cairo
- study of the Moon's secular acceleration (Newcomb)
- applied spherical trigonometry