The sky on September 13, 1978 — as it really was
That day the Sun stood in Leo, while the horoscope says "Virgo". The gap is 23.6° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 170.3° · sign Virgo · constellation Leo
- ☽︎ Moon — 305.4° · sign Aquarius · constellation Capricornus
- ☿︎ Mercury — 155.9° · sign Virgo · constellation Leo
- ♀︎ Venus — 215.4° · sign Scorpio · constellation Virgo
- ♂︎ Mars — 205.7° · sign Libra · constellation Virgo
- ♃︎ Jupiter — 121.5° · sign Leo · constellation Cancer
- ♄︎ Saturn — 156.1° · sign Virgo · constellation Leo
- ☽︎ Moon 85% 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, 85% lit; the Moon was 364,167 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
48.1 orbits of the Sun — 45,164 million km, that is 58,746 return trips to the Moon; 17,553 rotations of Earth; with the Sun — 348.8 billion km around the Galactic centre, 13.5 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 338 million km away; today it is 245 million km (closer 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 (24% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on August 8, 2027; Jupiter — in 2037; a full moon exactly on this date — September 13, 2057
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.