The sky on January 30, 1939 — as it really was
That day the Sun stood in Capricornus, while the horoscope says "Aquarius". The gap is 23.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 309.7° · sign Aquarius · constellation Capricornus
- ☽︎ Moon — 63.0° · sign Gemini · constellation Taurus
- ☿︎ Mercury — 296.5° · sign Capricorn · constellation Sagittarius
- ♀︎ Venus — 262.9° · sign Sagittarius · constellation Ophiuchus
- ♂︎ Mars — 240.7° · sign Sagittarius · constellation Libra
- ♃︎ Jupiter — 336.7° · sign Pisces · constellation Aquarius
- ♄︎ Saturn — 13.1° · sign Aries · constellation Pisces
- ☽︎ Moon 70% 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, 70% lit; the Moon was 373,375 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
87.7 orbits of the Sun — 82,401 million km, that is 107,181 return trips to the Moon; 32,025 rotations of Earth; with the Sun — 636.4 billion km around the Galactic centre, 24.6 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 250 million km away; today it is 244 million km (closer by 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 June 25, 2027; Jupiter — in 2034; a full moon exactly on this date — January 30, 2029
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,392″ 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.