☰ Free Online Ephemeris — Daily Planetary Positions for Any Month
Umbriel's free ephemeris is the raw almanac: where every planet actually sits, day by day, for any month of any year. Positions for midnight Universal Time, the same convention printed ephemerides use. Free, in your browser, no account.
- What you'll needNothing — it is the sky itself, not your chart
- What you getDaily positions for every planet, for whatever month and year you page to, forward or back
- CostFree — no account required
Runs in your browser. Nothing to install, nothing to set up.
What it actually is
An ephemeris is the table underneath all of astrology: a list of where each body was, on each day. Before software, casting a chart meant looking the positions up in one of these and interpolating by hand.
Umbriel's is navigable to any month of any year, forward or back, and every figure is computed by the same engine that casts the charts rather than read from a bundled table. That matters more than it sounds: it means the accuracy work done on the charts applies here too, and it means the range is not limited to whatever years a table happened to cover.
Positions are given for 00:00 Universal Time on each day — the convention printed ephemerides use, and the reason a figure here can be checked directly against one.
⚠️ Three specific corrections sit behind these numbers, each of which used to be wrong. The day-number arithmetic is valid across centuries rather than only 1901–2099, which had put every chart before 1900 out by whole days and the Moon by as much as half a sign. Chiron runs on real JPL orbital elements rather than a hand-calibrated orbit that drifted up to three degrees. And Pluto uses whichever of two methods measured better on each side of about 1885, because the series it used everywhere was only ever valid for the modern era.
How Umbriel computes it
Positions are given for midnight, 00:00 Universal Time, on each day of the month, which is the convention printed ephemerides use and the reason a figure here can be checked against one. Every value is computed by the same engine that casts the charts, not read from a bundled table — so the same accuracy work applies: the day-number arithmetic is valid across centuries rather than only 1901–2099, Chiron runs on real JPL orbital elements, and Pluto uses whichever of two methods measured better on each side of about 1885. Any month of any year can be paged to, forward or back.
What's in your result
- Any month, any yearPage forward or back without a range limit, or jump to today.
- Daily positions for every planetThe whole set, day by day, down the month.
- Midnight Universal TimeThe printed-ephemeris convention, so the figures are directly checkable.
- Computed, not looked upEvery value comes from the chart engine, so the accuracy is the chart's accuracy.
Common questions
What is an ephemeris?
A table of where each planet was on each day. It is the raw data underneath every chart — before software, astrologers cast charts by looking positions up in one and interpolating.
What time of day are the positions for?
Midnight, 00:00 Universal Time, which is the convention printed ephemerides use. That is what makes a figure here checkable against a book.
What years does it cover?
Any year you page to. The positions are computed rather than read from a table, so there is no range baked in — and the underlying date arithmetic is valid across centuries rather than only the modern era.
How accurate is it?
Every figure comes from the same engine that casts the charts, which is checked against JPL Horizons. See the accuracy page for the measured error, body by body.
Is the ephemeris free?
Yes, and it needs no birth details at all — it is the sky, not your chart.
Go deeper
Each of these is a free tool in its own right.
Umbriel offers every system here as a set of prompts to think with, never as a statement of fact about who you are. Take what's useful, leave the rest.