The sky on August 17, 1964 — as it really was
That day the Sun stood in Leo — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 144.6° · sign Leo · constellation Leo
- ☽︎ Moon — 260.3° · sign Sagittarius · constellation Ophiuchus
- ☿︎ Mercury — 167.8° · sign Virgo · constellation Leo
- ♀︎ Venus — 99.4° · sign Cancer · constellation Gemini
- ♂︎ Mars — 101.7° · sign Cancer · constellation Gemini
- ♃︎ Jupiter — 54.8° · sign Taurus · constellation Taurus
- ♄︎ Saturn — 332.2° · sign Pisces · constellation Aquarius
- ☽︎ Moon 72% 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, 72% lit; the Moon was 404,540 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
62.1 orbits of the Sun — 58,392 million km, that is 75,952 return trips to the Moon; 22,694 rotations of Earth; with the Sun — 451 billion km around the Galactic centre, 17.4 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 316 million km away; today it is 244 million km (closer by 1.3×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 19, on the decline (99% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on July 29, 2028; Jupiter — in 2035; a full moon exactly on this date — August 17, 2027
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 3,096″ since that day; the real constellations now sit 23.4° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.