What this checks
The locator compares apparent geocentric planetary longitudes from the independent birth-chart engine with the true-ecliptic-of-date projection of IAU J2000 star directions. It reports selected stars within 1° of a planet in longitude. It also reports the actual spherical angle, because many stars sit above or below the ecliptic. Stars whose ecliptic latitude exceeds 40° remain in the reference directory but are omitted from automatic matches.
This is one specific chart convention. Those techniques need different calculations and are not represented by these results. No result should be treated as a prediction of a life event or as evidence of a physical influence.
Position calculation
The IAU table identifies the named star and gives its right ascension and declination at J2000. Astronomy Engine rotates that direction to the true ecliptic and equinox of a chosen date. The displayed tropical longitude is the angle around the ecliptic; latitude records how far above or below that plane the star lies. The reference date on this page is 1 January 2026 at 12:00 UTC.
The calculation does not propagate individual stellar proper motion, parallax, or perspective effects. It is intended for modern reference dates, not ancient reconstructions. A planet sharing a projected longitude with a star can still be far away on the sky. The chart locator shows that full angular separation and limits automatic matches to stars within 40° of the ecliptic.