The sky on June 13, 1930 — as it really was
That day the Sun stood in Taurus, while the horoscope says "Gemini". The gap is 22.9° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 81.7° · sign Gemini · constellation Taurus
- ☽︎ Moon — 287.1° · sign Capricorn · constellation Sagittarius
- ☿︎ Mercury — 58.8° · sign Taurus · constellation Taurus
- ♀︎ Venus — 113.2° · sign Cancer · constellation Gemini
- ♂︎ Mars — 37.7° · sign Taurus · constellation Aries
- ♃︎ Jupiter — 86.9° · sign Gemini · constellation Taurus
- ♄︎ Saturn — 279.8° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon 95% illuminated
astronomy-engine ephemerides (VSOP87/ELP), IAU 1930 constellation boundaries. Positions accurate to a fraction of a degree.
The day’s dossier, from real data
Checkable facts with a tag and a source; the classical reading is in the chart.
- The Moon that day [EXACT]
waning gibbous, 95% lit; the Moon was 402,067 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
96.3 orbits of the Sun — 90,511 million km, that is 117,730 return trips to the Moon; 35,177 rotations of Earth; with the Sun — 699 billion km around the Galactic centre, 27 light-days.
29.78 km/s along the orbit; 230 km/s around the Galactic centre - Mars then and now [EXACT]
On that day Mars was 290 million km away; today it is 245 million km (closer by 1.2×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on April 2, 2028; Jupiter — in 2037; a full moon exactly on this date — June 12, 2033
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,824″ since that day; the real constellations now sit 22.9° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.