The sky on December 1, 1966 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 23.4° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 248.8° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 110.3° · sign Cancer · constellation Gemini
- ☿︎ Mercury — 228.9° · sign Scorpio · constellation Libra
- ♀︎ Venus — 254.4° · sign Sagittarius · constellation Ophiuchus
- ♂︎ Mars — 178.6° · sign Virgo · constellation Virgo
- ♃︎ Jupiter — 124.3° · sign Leo · constellation Cancer
- ♄︎ Saturn — 352.9° · sign Pisces · constellation Aquarius
- ☽︎ Moon 87% 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, 87% lit; the Moon was 378,620 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
59.8 orbits of the Sun — 56,241 million km, that is 73,154 return trips to the Moon; 21,858 rotations of Earth; with the Sun — 434.4 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 256 million km away; today it is 244 million km (closer by 1×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 20, right at the minimum (19% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on February 7, 2027; Jupiter — in 2037; a full moon exactly on this date — November 30, 2039
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,988″ 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.