The sky on September 13, 1988 — as it really was
That day the Sun stood in Leo, while the horoscope says "Virgo". The gap is 23.7° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 170.9° · sign Virgo · constellation Leo
- ☽︎ Moon — 195.9° · sign Libra · constellation Virgo
- ☿︎ Mercury — 197.3° · sign Libra · constellation Virgo
- ♀︎ Venus — 126.4° · sign Leo · constellation Cancer
- ♂︎ Mars — 9.3° · sign Aries · constellation Cetus
- ♃︎ Jupiter — 65.9° · sign Gemini · constellation Taurus
- ♄︎ Saturn — 266.1° · sign Sagittarius · constellation Sagittarius
- ☽︎ Moon 5% 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, 5% lit; the Moon was 403,750 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
38.1 orbits of the Sun — 35,767 million km, that is 46,523 return trips to the Moon; 13,901 rotations of Earth; with the Sun — 276.2 billion km around the Galactic centre, 10.7 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 60 million km away; today it is 244 million km (farther by 4.1×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 22, on the rise to maximum (21% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on March 14, 2028; Jupiter — in 2035; 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 1,908″ since that day; the real constellations now sit 23.7° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.