The natal wheel
The sky over one place, at one minute.
Give it a date, a time and a town, and it draws what was overhead there — thirteen bodies, seven house systems, every angle measured.
Births before standard time are handled the way archivists handle them: Local Mean Time derived from the birth meridian, not the nearest zone's retrofitted offset. Thirteen minutes of clock error is three degrees of Ascendant — the difference between one chart and another.
Fig. 1 — the sky now, geocentric, houses omitted
Transits
The sky keeps moving. The chart doesn't.
Set any date and the instrument lays the moving sky over the natal wheel — transiting bodies in slate, natal in ink — and lists every contact inside two and a half degrees.
Orbs are deliberately tight. A seven-degree natal trine is a standing feature of a life; a seven-degree transiting trine covers months and dates nothing. Here, an aspect appears when it is close enough to have a date.
“Applying or separating — → the aspect is still to come, ← it has already been exact.”
The catalogue
Whose chart, and how do you know?
1,768,650 people on file, 37,224 of them with a birth time solid enough to draw houses from. Browse by any placement — Venus in Scorpio is one click — or set two charts against each other.
Every entry carries its Rodden rating in plain sight. A chart built on a birth certificate and a chart built on someone's recollection are not the same object, and a catalogue that hides the difference is selling you the second as the first. Where the time is missing or disputed, the wheel shows planets only — no Ascendant, no cusps, and a note saying why.
| Code | Means | Houses |
|---|---|---|
| AA | Birth certificate | drawn |
| A | From memory | drawn |
| B | Biography | drawn |
| C | Caution | drawn |
| DD | Dirty data | withheld |
| X | No birth time | withheld |
| XX | No birth date | withheld |
Fig. 2 — the Rodden scale, and what each grade earns
Verification
Checked against the record.
Every figure below was computed for this page view and set against the published values for Albert Einstein — born 14 March 1879, 11:30 local mean time, Ulm; birth certificate in hand (Rodden AA).
The angles are additionally cross-checked against independent spherical-astronomy formulae, which agree with the house engine to eight decimal places.
| Point | Computed now | Published | |
|---|---|---|---|
| Sun | 23°30' ♓︎ | 23°30′ Pisces | ≤ 1′ |
| Moon | 14°31' ♐︎ | 14°32′ Sagittarius | ≤ 1′ |
| Ascendant | 11°38' ♋︎ | 11°39′ Cancer | ≤ 1′ |
| Midheaven | 12°50' ♓︎ | 12°50′ Pisces | ≤ 1′ |
Recomputed on every load — this table is live