The sky on April 13, 1957 — as it really was
That day the Sun stood in Pisces, while the horoscope says "Aries". The gap is 23.3° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 23.3° · sign Aries · constellation Pisces
- ☽︎ Moon — 189.7° · sign Libra · constellation Virgo
- ☿︎ Mercury — 42.7° · sign Taurus · constellation Aries
- ♀︎ Venus — 23.0° · sign Aries · constellation Pisces
- ♂︎ Mars — 76.7° · sign Gemini · constellation Taurus
- ♃︎ Jupiter — 173.7° · sign Virgo · constellation Virgo
- ♄︎ Saturn — 254.0° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon 99% 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]
full moon, 99% lit; the Moon was 365,297 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
69.5 orbits of the Sun — 65,294 million km, that is 84,929 return trips to the Moon; 25,377 rotations of Earth; with the Sun — 504.3 billion km around the Galactic centre, 19.5 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 298 million km away; today it is 245 million km (closer by 1.2×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 19, on the rise to maximum (29% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 15, 2026; Jupiter — in 2028; 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 3,492″ since that day; the real constellations now sit 23.3° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.