The sky on September 13, 1951 — as it really was
That day the Sun stood in Leo, while the horoscope says "Virgo". The gap is 23.2° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 169.9° · sign Virgo · constellation Leo
- ☽︎ Moon — 323.2° · sign Aquarius · constellation Capricornus
- ☿︎ Mercury — 152.7° · sign Virgo · constellation Leo
- ♀︎ Venus — 154.8° · sign Virgo · constellation Sextans
- ♂︎ Mars — 136.6° · sign Leo · constellation Cancer
- ♃︎ Jupiter — 11.7° · sign Aries · constellation Pisces
- ♄︎ Saturn — 183.5° · sign Libra · constellation Virgo
- ☽︎ Moon 95% 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, 95% lit; the Moon was 368,526 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
75.1 orbits of the Sun — 70,541 million km, that is 91,754 return trips to the Moon; 27,416 rotations of Earth; with the Sun — 544.8 billion km around the Galactic centre, 21 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 355 million km away; today it is 245 million km (closer by 1.5×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on December 7, 2026; Jupiter — in 2034; 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 3,780″ since that day; the real constellations now sit 23.2° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.