The sky on May 31, 1983 — as it really was
That day the Sun stood in Taurus, while the horoscope says "Gemini". The gap is 23.6° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 69.5° · sign Gemini · constellation Taurus
- ☽︎ Moon — 302.5° · sign Aquarius · constellation Capricornus
- ☿︎ Mercury — 47.7° · sign Taurus · constellation Aries
- ♀︎ Venus — 114.0° · sign Cancer · constellation Gemini
- ♂︎ Mars — 70.3° · sign Gemini · constellation Taurus
- ♃︎ Jupiter — 245.6° · sign Sagittarius · constellation Scorpius
- ♄︎ Saturn — 208.5° · sign Libra · constellation Virgo
- ☽︎ Moon 80% 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, 80% lit; the Moon was 404,329 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
43.3 orbits of the Sun — 40,738 million km, that is 52,990 return trips to the Moon; 15,833 rotations of Earth; with the Sun — 314.6 billion km around the Galactic centre, 12.1 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 379 million km away; today it is 244 million km (closer by 1.6×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 21, on the decline (69% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on July 21, 2028; Jupiter — in 2030; a full moon exactly on this date — May 30, 2045
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,160″ since that day; the real constellations now sit 23.6° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.