Stjernerne · calculation record

A checked foundation.

Settings

Swiss Ephemeris 2.10.03; pinned Swiss ephemeris files, geocentric apparent tropical longitudes, Placidus and True North Node. Historical IANA time zones. Unknown or ambiguous time is never silently guessed. Placidus is limited to latitudes below 66° in this demo.

2027 selection

Jupiter and Saturn, five major aspects, to natal Sun, Moon, Mercury, Venus, Mars, Saturn and Ascendant. One-degree transit windows; exact contacts solved with the existing station-aware ephemeris routine. The interval runs from 1 January 2027 inclusive to 1 January 2028 exclusive, UTC. No interpretation of other transits is implied.

Verification

Ten native/browser scenarios passed, including southern hemisphere, time-zone ambiguity, an invalid clock time and rejection of unsupported input. 1,585 numerical comparisons; largest numerical difference 0.0000000127. Largest native/browser event-time difference: 2 milliseconds.

All 15 exact contacts in Alex’s selected timeline agree with the original report’s separately implemented event scan within one second. Exact angular residuals were below 0.000001 arcsecond. This compares implementations of the same Swiss engine; it is not a second independent astronomical ephemeris.

The 14-page PDF is the unchanged, previously reviewed fictional sample. Its page-by-page visual review is retained internally. Date rounding can differ at the final second; the displayed report dates and example positions agree.

Limits

The preview is a short demonstration of a reading structure, not a complete, individually edited synthesis. The fixed PDF remains Alex’s example even when you enter other data. This app has no order, payment, report delivery or customer database.

Numerical audit · Browser comparison · Fictional PDF · Source and licences