The sky on May 21, 1991 — as it really was
That day the Sun stood in Taurus — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 59.9° · sign Taurus · constellation Taurus
- ☽︎ Moon — 158.5° · sign Virgo · constellation Sextans
- ☿︎ Mercury — 35.8° · sign Taurus · constellation Aries
- ♀︎ Venus — 103.7° · sign Cancer · constellation Gemini
- ♂︎ Mars — 117.1° · sign Cancer · constellation Gemini
- ♃︎ Jupiter — 127.4° · sign Leo · constellation Cancer
- ♄︎ Saturn — 306.8° · sign Aquarius · constellation Capricornus
- ☽︎ Moon 58% 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, 58% lit; the Moon was 379,639 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
35.4 orbits of the Sun — 33,244 million km, that is 43,241 return trips to the Moon; 12,920 rotations of Earth; with the Sun — 256.7 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 296 million km away; today it is 245 million km (closer by 1.2×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 22, near maximum (48% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on February 14, 2027; Jupiter — in 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.