The sky on April 13, 1978 — as it really was
That day the Sun stood in Pisces, while the horoscope says "Aries". The gap is 23.6° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 23.2° · sign Aries · constellation Pisces
- ☽︎ Moon — 90.5° · sign Cancer · constellation Orion
- ☿︎ Mercury — 20.1° · sign Aries · constellation Pisces
- ♀︎ Venus — 43.1° · sign Taurus · constellation Aries
- ♂︎ Mars — 121.0° · sign Leo · constellation Cancer
- ♃︎ Jupiter — 90.2° · sign Cancer · constellation Gemini
- ♄︎ Saturn — 143.8° · sign Leo · constellation Leo
- ☽︎ Moon 31% 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 crescent, 31% lit; the Moon was 403,886 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
48.5 orbits of the Sun — 45,558 million km, that is 59,258 return trips to the Moon; 17,706 rotations of Earth; with the Sun — 351.9 billion km around the Galactic centre, 13.6 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 180 million km away; today it is 245 million km (farther by 1.4×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 21, on the rise to maximum (20% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on March 8, 2027; Jupiter — in 2037; 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 2,412″ since that day; the real constellations now sit 23.6° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.