The sky on December 13, 1937 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 23.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 261.1° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 21.8° · sign Aries · constellation Pisces
- ☿︎ Mercury — 281.6° · sign Capricorn · constellation Sagittarius
- ♀︎ Venus — 248.5° · sign Sagittarius · constellation Ophiuchus
- ♂︎ Mars — 323.8° · sign Aquarius · constellation Capricornus
- ♃︎ Jupiter — 298.6° · sign Capricorn · constellation Sagittarius
- ♄︎ Saturn — 358.5° · sign Pisces · constellation Pisces
- ☽︎ Moon 76% 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, 76% lit; the Moon was 370,822 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
88.8 orbits of the Sun — 83,461 million km, that is 108,561 return trips to the Moon; 32,438 rotations of Earth; with the Sun — 644.6 billion km around the Galactic centre, 24.9 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 230 million km away; today it is 245 million km (farther by 1.1×).
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 March 25, 2028; Jupiter — in 2032; 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 4,464″ since that day; the real constellations now sit 23° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.