The sky on December 6, 1927 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 22.9° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 253.4° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 42.5° · sign Taurus · constellation Aries
- ☿︎ Mercury — 235.8° · sign Scorpio · constellation Libra
- ♀︎ Venus — 207.4° · sign Libra · constellation Virgo
- ♂︎ Mars — 238.6° · sign Scorpio · constellation Libra
- ♃︎ Jupiter — 354.1° · sign Pisces · constellation Pisces
- ♄︎ Saturn — 250.5° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon 93% 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]
waxing gibbous, 93% lit; the Moon was 361,344 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
98.8 orbits of the Sun — 92,882 million km, that is 120,814 return trips to the Moon; 36,099 rotations of Earth; with the Sun — 717.4 billion km around the Galactic centre, 27.7 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 371 million km away; today it is 244 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 August 13, 2027; Jupiter — in 2034; a full moon exactly on this date — December 6, 2033
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,968″ since that day; the real constellations now sit 22.9° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.