The sky on September 29, 2013 — as it really was
That day the Sun stood in Virgo, while the horoscope says "Libra". The gap is 24.1° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 186.5° · sign Libra · constellation Virgo
- ☽︎ Moon — 122.0° · sign Leo · constellation Cancer
- ☿︎ Mercury — 210.0° · sign Scorpio · constellation Virgo
- ♀︎ Venus — 230.8° · sign Scorpio · constellation Libra
- ♂︎ Mars — 140.3° · sign Leo · constellation Leo
- ♃︎ Jupiter — 108.2° · sign Cancer · constellation Gemini
- ♄︎ Saturn — 219.8° · sign Scorpio · constellation Libra
- ☽︎ Moon 29% 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]
waning crescent, 29% lit; the Moon was 402,397 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
13 orbits of the Sun — 12,233 million km, that is 15,912 return trips to the Moon; 4,754 rotations of Earth; with the Sun — 94.5 billion km around the Galactic centre, 3.6 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 321 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 24, on the rise to maximum (44% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 29, 2026; Jupiter — in 2037; a full moon exactly on this date — September 29, 2042
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 648″ since that day; the real constellations now sit 24.1° away from the astrologers’ “signs”.
precession 50.29″/yr - Picture of the day [EXACT]
NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap130929.html
NASA APOD
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