The sky on April 13, 1958 — 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 — 23.1° · sign Aries · constellation Pisces
- ☽︎ Moon — 321.7° · sign Aquarius · constellation Capricornus
- ☿︎ Mercury — 28.5° · sign Aries · constellation Pisces
- ♀︎ Venus — 336.7° · sign Pisces · constellation Aquarius
- ♂︎ Mars — 320.0° · sign Aquarius · constellation Capricornus
- ♃︎ Jupiter — 207.3° · sign Libra · constellation Virgo
- ♄︎ Saturn — 265.6° · sign Sagittarius · constellation Sagittarius
- ☽︎ Moon 26% 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]
waning crescent, 26% lit; the Moon was 401,074 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
68.5 orbits of the Sun — 64,354 million km, that is 83,707 return trips to the Moon; 25,011 rotations of Earth; with the Sun — 497 billion km around the Galactic centre, 19.2 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 235 million km away; today it is 245 million km (farther by 1×).
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 (38% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 15, 2027; Jupiter — in 2029; 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 3,420″ 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.