Ephemeris
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An ephemeris (plural: ephemerides) is a table with the daily positions[1] of the planets. Older ephemerides often showed the positions at noon; modern ephemerides show the midnight positions of the planets, Chiron and the Lunar Nodes. In ephemerides of minor planets and asteroids, the weekly or monthly position is usually given.
There exist also graphic ephemerides[2] which make it easy to follow at one glance the movement of a planet over a long period.
| Ephemerides of special Objects |
|---|
| minor planet Eris |
| minor planet MakeMake |
| minor planet Quaoar |
| minor planet Sedna |
| minor planet Orcus |
| asteroid Eros |
| asteroid Hermes |
See also
Weblinks
- Wikipedia: Ephemeris
- Wikipedia: Zij (on Islamic Ephemerides)
- Wikipedia: Alfonsine tables
- Wikipedia: Raphael's Ephemeris
- Wikipedia: Rudolphine Tables
- Download of Prutenicae Tabulae coelestium motuum (PDF)[3]
- Astronomical Tables (Starry Messenger, 1999)
- How to read planetary positions in an ephemeris (Deborah Houlding for beginners)
- How to Read an Ephemeris (In episode 304 Patrick Watson joins the podcast of Chris Brennan 2021, 2h23)
The Alfonsine tables[4]
Notes and Sources
- ↑ Selection of Ephemerides for 6000 years at Astrodienst
- ↑ Graphic Ephemeris in 45° System for 5 years
- ↑ 1551; ETH Zurich
- ↑ 13th century
