The sky on August 13, 1986 — as it really was
That day the Sun stood in Leo — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 140.4° · sign Leo · constellation Leo
- ☽︎ Moon — 235.7° · sign Scorpio · constellation Libra
- ☿︎ Mercury — 121.7° · sign Leo · constellation Cancer
- ♀︎ Venus — 185.9° · sign Libra · constellation Virgo
- ♂︎ Mars — 281.4° · sign Capricorn · constellation Sagittarius
- ♃︎ Jupiter — 351.3° · sign Pisces · constellation Aquarius
- ♄︎ Saturn — 243.1° · sign Sagittarius · constellation Scorpius
- ☽︎ Moon 55% 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]
first quarter, 55% lit; the Moon was 370,371 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
40.1 orbits of the Sun — 37,725 million km, that is 49,071 return trips to the Moon; 14,662 rotations of Earth; with the Sun — 291.4 billion km around the Galactic centre, 11.2 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 68 million km away; today it is 245 million km (farther by 3.6×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 21, on the decline (100% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on December 30, 2027; Jupiter — in 2033; a full moon exactly on this date — August 13, 2030
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,016″ 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.