The sky on April 13, 1939 — as it really was
That day the Sun stood in Pisces, while the horoscope says "Aries". The gap is 23.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 22.7° · sign Aries · constellation Pisces
- ☽︎ Moon — 312.6° · sign Aquarius · constellation Aquarius
- ☿︎ Mercury — 6.1° · sign Aries · constellation Pisces
- ♀︎ Venus — 345.6° · sign Pisces · constellation Aquarius
- ♂︎ Mars — 282.4° · sign Capricorn · constellation Sagittarius
- ♃︎ Jupiter — 354.0° · sign Pisces · constellation Pisces
- ♄︎ Saturn — 21.2° · sign Aries · constellation Pisces
- ☽︎ Moon 33% 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]
last quarter, 33% lit; the Moon was 404,651 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
87.5 orbits of the Sun — 82,211 million km, that is 106,934 return trips to the Moon; 31,951 rotations of Earth; with the Sun — 634.9 billion km around the Galactic centre, 24.5 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 146 million km away; today it is 245 million km (farther by 1.7×).
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 September 6, 2027; Jupiter — in 2034; a full moon exactly on this date — April 13, 2063
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.