The sky on September 21, 1966 — as it really was
That day the Sun stood in Virgo — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 178.1° · sign Virgo · constellation Virgo
- ☽︎ Moon — 266.9° · sign Sagittarius · constellation Sagittarius
- ☿︎ Mercury — 187.2° · sign Libra · constellation Virgo
- ♀︎ Venus — 165.5° · sign Virgo · constellation Leo
- ♂︎ Mars — 137.0° · sign Leo · constellation Cancer
- ♃︎ Jupiter — 119.1° · sign Cancer · constellation Cancer
- ♄︎ Saturn — 356.1° · sign Pisces · constellation Aquarius
- ☽︎ Moon 49% 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, 49% lit; the Moon was 387,729 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
60 orbits of the Sun — 56,421 million km, that is 73,388 return trips to the Moon; 21,928 rotations of Earth; with the Sun — 435.8 billion km around the Galactic centre, 16.8 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 335 million km away; today it is 245 million km (closer by 1.4×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 20, right at the minimum (17% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 28, 2026; Jupiter — in 2037; a full moon exactly on this date — September 20, 2040
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 3,024″ since that day; the real constellations now sit 23.4° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.