The sky on December 9, 1947 — 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 — 256.6° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 221.6° · sign Scorpio · constellation Libra
- ☿︎ Mercury — 243.0° · sign Sagittarius · constellation Scorpius
- ♀︎ Venus — 281.0° · sign Capricorn · constellation Sagittarius
- ♂︎ Mars — 152.6° · sign Virgo · constellation Leo
- ♃︎ Jupiter — 250.2° · sign Sagittarius · constellation Ophiuchus
- ♄︎ Saturn — 142.7° · sign Leo · constellation Leo
- ☽︎ Moon 9% 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 crescent, 9% lit; the Moon was 389,241 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
78.8 orbits of the Sun — 74,079 million km, that is 96,357 return trips to the Moon; 28,791 rotations of Earth; with the Sun — 572.1 billion km around the Galactic centre, 22.1 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 162 million km away; today it is 243 million km (farther 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 December 7, 2026; Jupiter — in 2030; a full moon exactly on this date — December 9, 2049
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 3,960″ 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.