Fifteen evaluated candidates
The catalogue, checked.
Full positions, explicit selection, independent comparison.
NASA/JPL Horizons comparison
All fifteen bodies were evaluated with the retained Swiss Ephemeris 2.10.03 engine at three times: 15 June 1950 at 12:00 UTC/UT, the fictional birth on 14 March 1990 at 10:20 UTC, and 21 October 2026 at 12:00 UTC. Horizons uses geocentric observer 500@399 and apparent ecliptic longitude/latitude of date, quantity 31, without atmospheric refraction. Returned dates were matched chronologically.
The table shows the larger of longitude and latitude residuals, in arcseconds. All fifteen birth-time comparisons are below one arcsecond. The maximum across all 45 is 3.863 arcseconds for Orcus in 1950. Small residuals reflect different orbital solutions and models; these sample checks do not verify every possible date.
| Body | MPC | 1950 | 1990 birth | 2026 |
|---|---|---|---|---|
| Ceres | 1 | 0.477″ | 0.077″ | 0.024″ |
| Juno | 3 | 0.352″ | 0.197″ | 0.230″ |
| Eros | 433 | 0.093″ | 0.047″ | 0.045″ |
| Chiron | 2060 | 0.185″ | 0.152″ | 0.059″ |
| Nessus | 7066 | 0.090″ | 0.054″ | 0.052″ |
| Orcus | 90482 | 3.863″ | 0.945″ | 0.157″ |
| Makemake | 136472 | 1.059″ | 0.309″ | 0.089″ |
| Pallas | 2 | 0.380″ | 0.312″ | 0.466″ |
| Vesta | 4 | 0.677″ | 0.452″ | 0.610″ |
| Pholus | 5145 | 1.397″ | 0.297″ | 0.138″ |
| Chariklo | 10199 | 0.504″ | 0.268″ | 0.102″ |
| Hylonome | 10370 | 0.094″ | 0.047″ | 0.047″ |
| Pelion | 49036 | 0.093″ | 0.050″ | 0.051″ |
| Okyrhoe | 52872 | 0.431″ | 0.187″ | 0.151″ |
| Bienor | 54598 | 0.363″ | 0.116″ | 0.046″ |
Before 1972 the retained engine treats civil time input as UT1; historical time zones use bundled IANA data. Horizons’ quantity 31 uses its IAU76/80 ecliptic frame. We compare angular positions, not astrology’s symbolic claims.
What changed in the sample?
All fifteen candidates are now calculated. Pholus square Sun and Pallas opposite Moon remain selected. Pelion opposite Ascendant is added at 0°13′35″: the same geometry as its conjunction with the Descendant. It is counted once.
At the fictional recorded time, Pelion is in Placidus house 7. Five minutes later it is in house 6; at both five-minute endpoints it is outside the half-degree angular rule. The interface warns about this dependence on birth time.
The earlier report used explicit Moshier planetary background; this edition uses the retained Swiss planetary files. Minor nearest-second rounding differences do not change the two existing selections. Full precision is retained for comparisons.
Rules and test coverage
AA-15 is a proposed catalogue. Candidates are compared only with ten planets, Ascendant and Midheaven. Conjunction, sextile, square, trine and opposition qualify at ≤0.5°. Nodes and minor-body pairs are not selected. Natal background orbs are 6°, except sextile 4°. The true nodes are shown for context. Houses use ecliptic longitude, not a latitude-sensitive mundane position.
Fourteen native/browser scenarios passed 5,223 numerical comparisons; maximum absolute difference 2.1111e-8. Separate trigonometric contact checks and house-interval checks passed. Tests cover historical and future inputs, daylight-saving gaps and both repeated-hour choices, the birth-time boundary, unknown times, and polar Placidus failure. Missing ephemerides or unsupported houses cause an error; there is no silent substitute.
Ephemeris files are pinned by SHA-256 in the browser data manifest. This prototype’s 1800–2095 input window does not imply equal observational precision for all minor bodies across that span. Near a selection cutoff, inspect source precision and the recorded birth time before committing to a profile.
Sources and review material
NASA/JPL Horizons documentation
Astrodienst ephemeris distribution
Benjamin’s official website
Asteroid method · Centaur context
New six-page complete-catalogue review · Prototype source, comparison summaries and licences
Original interpretation and exercises are proposals for Benjamin’s review. No endorsement, licensed interpretation library or commercial agreement is implied.