Uranian 90° dial online

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The Uranian dial

ZEUS Online opens on the Uranian (Hamburg School) dial: a rotating 360°/90°/45° disc with a pointer. Drag the pointer with the mouse or your finger; clicking an object sets the axis exactly on it. Orb sectors and symmetry lines — the planetary pictures — are highlighted along the axis and listed on the “Pictures” tab. The “Axis by formula” block places the axis at a sum of the form a + b − c, optionally locking it to the formula. The eight Hamburg bodies (Cupido, Hades, Zeus, Kronos, Apollon, Admetos, Vulkanus, Poseidon) are calculated together with the planets.

Prefer a classic wheel? The “Uranian ▾” menu switches to Modern — a traditional chart with houses, aspects and position tables.

Quick start

Click the chart chip above the wheel and enter the date, time and place of birth. Cities are searched by name; the first Enter in the “City” field picks the top suggestion, a second Enter builds the chart. The time zone is filled in automatically from the place and date, historical changes included. Charts are calculated in the tropical zodiac, geocentrically.

The ⌖ button in the chip editor sets “here and now”: the current date, time and — for the first circle — the place taken from your browser’s time zone. Such a chart stays live: next time you open the site it will show the current moment again. As soon as you enter your own data the circle stops updating and your chart is kept.

Circles: transits, progressions, directions

The “+” button adds a second and third circle — Transit, Progression, Direction or Solar arc (the type is chosen in the circle’s chip). Pairs of circles for aspect calculation are switched in the “Aspects” panel above the wheel; every interaction type has its own set of orbs, edited in Settings.

Event pool

The 💾 icon in the chip editor saves an event to the pool — the list on the “Pool” tab. Double-clicking an event loads it as the natal chart, the ⋮ menu sends it to any circle, renames or deletes it. The pool is stored in your browser.

Geomap (astrocartography)

The “Geomap” item in the configuration menu draws planetary lines on a world map: the places where a planet stood exactly on the MC, IC, Ascendant or Descendant at the moment of birth. MC/IC labels stay at the bottom edge of the map, As/Dsc labels ride the dashed red parallel that follows the centre of the map. The buttons under the zoom control restore the whole-world view and jump to the place of the first circle. The “Lines” tab on the right switches angles and planets on and off. Tap a line (or its badge) to open its interpretation — what this planet means on this angle; the “?” button next to a planet shows all of its lines at once. The full reference lives at “Meaning of the lines”. Online the seven classical planets are drawn; outer planets, aspect lines and parans are part of ZEUS for desktop. Lines can be calculated in mundo (using the ecliptic latitude of the body) or zodiacally — the switch is in Settings.

Time dynamics

The ⏱ button opens the time-scrolling window: choose a circle and a step (from minutes to years), move with the ◄ ► buttons or start the ▶ animation. The ⟲ button returns to the original moment.

Tables and settings

To the right of the wheel are the “Positions” (“Pictures” in the Uranian configuration), “Aspects” and “Houses” tabs. The gear ⚙ opens the settings: the set of objects, aspects and orb sets, the house system (Placidus, Koch, Regiomontanus), aspect colours and table appearance. The “Parameters” line in the corner of the wheel leads to the same place. The light and dark themes are switched next to the help button.

Sharing a chart

The 🔗 button opens a menu: copy a link to the chart (it opens with all the circles for anyone — handy for a forum thread), copy the wheel to the clipboard as an image (paste it with Ctrl+V into a message or chat) or save it as a PNG file.

Online and the desktop version

The online calculations follow the same algorithms as the desktop ZEUS astrology software. The full working toolkit — four circles, every kind of progression and direction, astrocartography with aspect lines and parans, Uranian and traditional astrology, interpretations — is in the desktop version of ZEUS for Windows and macOS.

Calculations — Swiss Ephemeris © Astrodienst AG, under the ZEUS product licence.

The dial above is a working Uranian instrument, not an illustration: a 90-degree dial with a rotating pointer, midpoints, and all eight transneptunian points of the Hamburg School. Enter a birth date, time and place — and turn the pointer.

Everything runs in the browser, free and without registration. Positions are computed with the Swiss Ephemeris — the same standard used by professional astrological software.

Why Uranian astrology needs a dial

The Hamburg School reads a chart through symmetry. Its working units are the midpoint — the spot exactly halfway between two planets — and the planetary picture, a combination written as a formula like A + B − C. On an ordinary 360° wheel these structures are invisible: you would have to compute every pair by hand.

The 90° dial solves this mechanically. The zodiac is folded into a quarter circle, so any two planets in conjunction, square or opposition occupy the same degree of the dial. Point the pointer at a planet — and every object sitting symmetrically around that axis shows itself immediately. What takes a table of numbers elsewhere becomes a single turn of the wheel.

What this online dial can do

  • 90° and 45° dials with a rotating pointer and highlighting of symmetrical pairs;
  • midpoints read directly off the pointer axis;
  • the eight TNPs — Cupido, Hades, Zeus, Kronos, Apollon, Admetos, Vulkanus, Poseidon;
  • natal charts, transits, progressions and directions — pictures can be watched in time, not only in the radix;
  • astrocartography as a separate mode, if you also work with location;
  • shareable links and PNG export — a chart can be sent to a student or a client as it is.

Online and desktop

The online dial covers the everyday workflow. The desktop ZEUS astroprocessor adds the full Hamburg toolkit: a planetary pictures table with sums and differences, arc resonances, sensitive points by the A + B − C formula, and object positions in the six Hamburg horoscopes — along with everything else a professional astroprocessor does. It runs on Windows and macOS — Intel and Apple Silicon Macs alike. The calculation engine is the same — the difference is the depth of the toolkit.

Download ZEUS — 21 days free Windows and macOS · no auto-renewal

Frequently asked questions

What is a 90° dial?

A 90-degree dial compresses the 360° zodiac into a quarter circle: cardinal, fixed and mutable signs overlay each other. Planets in hard aspect — conjunction, square, opposition — land on the same spot of the dial, so the structures Uranian astrology works with become visible at a glance instead of being calculated aspect by aspect.

What is Uranian astrology in simple terms?

A school founded by Alfred Witte in Hamburg in the 1920s. Instead of reading planets one by one it studies symmetry: pairs of planets equidistant from an axis (midpoints) and combinations expressed by formulas such as A + B − C, called planetary pictures. The dial with a rotating pointer is its main working instrument.

What are the transneptunian points (TNPs)?

Eight hypothetical points beyond Neptune used by the Hamburg School: Cupido, Hades, Zeus and Kronos introduced by Witte, and Apollon, Admetos, Vulkanus and Poseidon added by Friedrich Sieggrün. They are not observed astronomical bodies — they are calculated points whose ephemerides the school refined over decades of practice. This tool includes all eight.

What is a midpoint and why does it matter?

A midpoint is the spot exactly halfway between two planets. In the symmetrical approach a planet standing on the midpoint of two others connects their meanings into one picture — often more concretely than a classical aspect would. On the dial, midpoints are read directly off the pointer axis.

Do I need an exact birth time for dial work?

The dial itself works with any time, but Uranian technique leans heavily on the Meridian and Ascendant as personal points, and those move fast. With an uncertain birth time, start from the pictures built on the Sun, Moon and slow planets, and treat axes involving the MC or AC with caution.

Is the online dial really free?

Yes. No sign-up, no trial timer, no watermarks. Positions are computed with the Swiss Ephemeris, the same standard professional programs use. The desktop ZEUS is a separate paid program with a free 21-day demo.

Where to go next

Calculations — Swiss Ephemeris © Astrodienst AG, licensed for the ZEUS product.