The sky on April 21, 1991 — as it really was
That day the Sun stood in Aries, while the horoscope says "Taurus". The gap is 23.7° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 30.9° · sign Taurus · constellation Aries
- ☽︎ Moon — 120.5° · sign Leo · constellation Cancer
- ☿︎ Mercury — 19.9° · sign Aries · constellation Pisces
- ♀︎ Venus — 69.9° · sign Gemini · constellation Taurus
- ♂︎ Mars — 100.0° · sign Cancer · constellation Gemini
- ♃︎ Jupiter — 124.3° · sign Leo · constellation Cancer
- ♄︎ Saturn — 306.3° · sign Aquarius · constellation Capricornus
- ☽︎ Moon 50% 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]
first quarter, 50% lit; the Moon was 371,956 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
35.5 orbits of the Sun — 33,321 million km, that is 43,341 return trips to the Moon; 12,950 rotations of Earth; with the Sun — 257.3 billion km around the Galactic centre, 9.9 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 257 million km away; today it is 245 million km (closer by 1×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 22, near maximum (47% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on January 15, 2027; Jupiter — in 2027; a full moon exactly on this date — April 20, 2027
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 1,764″ since that day; the real constellations now sit 23.7° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.