Calculation checks & scope

Independent Stjernerne proposal for Dale O’Brien. Review edition, 21 October 2026. No approved partnership is implied.

Method preserved from the sample

Geocentric apparent tropical positions, Swiss Ephemeris 2.10.03 with DE441 data; Koch houses with ecliptic-longitude house assignment. Ten planets plus Chiron. No nodes or transits in this demonstration. London 18 April 1977 09:20 BST converts to 08:20 UTC using historical IANA time-zone data.

Koch and the following orb rules are prototype assumptions requiring Dale’s approval. Conjunction/opposition: 5° with Sun or Moon, otherwise 4°. Square/trine: 4° with a luminary, otherwise 3°. Sextile: 3° with a luminary, otherwise 2°. Chiron-to-ASC/MC conjunction/opposition: 2°.

The short guide selects one eligible luminary first, then the closest remaining direct Chiron contact relative to its allowed orb, up to two actors. It does not invent a contact when none qualifies. This is an editorial proposal, not Dale’s established ranking algorithm.

What was checked

• All eleven sample positions, houses and motions and twelve Koch cusps compared with the retained reference. DE441 and the old Moshier reference differ by less than 0.72 arcsecond; printed minute positions and houses are preserved.
• Nine browser/native scenarios, 2,636 numeric comparisons, maximum absolute difference 0.000000022. Includes changed birth data, unknown time, historical DST, a missing clock time and both readings of an ambiguous clock time.
• All eleven positions independently compared with NASA/JPL Horizons at the exact example epoch: maximum coordinate difference 0.092 arcsecond. This resolves the independent astronomical-reference point left open in the original sample documentation.
• One-minute samples over ±5 minutes, with Chiron/Sun/Moon house changes refined by bisection. The Moon moves from house 11 to 10 at 09:22:31.478 BST. The old reference gives 09:22:31.466; the 0.013-second difference does not change the caveat. This is not rectification.
• The unchanged 22-page fictional PDF matches the SHA-256 of the retained page-by-page visual review. The original Word, production ZIP and historical Kerykeion test were not recovered or recertified.

Calculation audit · Browser/native checks · Independent ephemeris comparison · Unchanged fictional sample

Editorial and production limits

The short guide is original demonstration text, not Dale’s writing. Its mythic framework, transfer of themes into natal interpretation, Koch/orb choices, AI-assisted production and brand use all require his review. The sample’s workshop invitation and eighteen years of editing are supplied fiction. User context is explicitly entered and kept apart from calculated positions. The thirty-day plan is ordinary planning, not an astrological election.

Before customer use: agree rights, fees, review workload and an interpretation library; add validated ordering and consent, test payment with verified event handling, a production queue, editorial review and private delivery. The current demo stores nothing and sends nothing.

Primary sources

Dale’s astrology · Dale’s astromythology · Swiss Ephemeris · NASA/JPL Horizons · Demo source and licences