The sky on December 13, 1946 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 23.1° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 260.9° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 146.4° · sign Leo · constellation Leo
- ☿︎ Mercury — 240.6° · sign Sagittarius · constellation Libra
- ♀︎ Venus — 227.6° · sign Scorpio · constellation Libra
- ♂︎ Mars — 267.0° · sign Sagittarius · constellation Sagittarius
- ♃︎ Jupiter — 226.9° · sign Scorpio · constellation Libra
- ♄︎ Saturn — 128.4° · sign Leo · constellation Cancer
- ☽︎ Moon 71% 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, 71% lit; the Moon was 373,318 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
79.8 orbits of the Sun — 75,003 million km, that is 97,559 return trips to the Moon; 29,150 rotations of Earth; with the Sun — 579.3 billion km around the Galactic centre, 22.4 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 363 million km away; today it is 245 million km (closer by 1.5×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on October 29, 2027; Jupiter — in 2029; a full moon exactly on this date — December 13, 2046
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 3,996″ since that day; the real constellations now sit 23.1° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.