The sky on October 13, 2009 — as it really was
That day the Sun stood in Virgo, while the horoscope says "Libra". The gap is 24.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 200.3° · sign Libra · constellation Virgo
- ☽︎ Moon — 138.3° · sign Leo · constellation Cancer
- ☿︎ Mercury — 185.0° · sign Libra · constellation Virgo
- ♀︎ Venus — 178.2° · sign Virgo · constellation Virgo
- ♂︎ Mars — 118.4° · sign Cancer · constellation Cancer
- ♃︎ Jupiter — 317.2° · sign Aquarius · constellation Capricornus
- ♄︎ Saturn — 178.1° · sign Virgo · constellation Virgo
- ☽︎ Moon 27% 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, 27% lit; the Moon was 369,057 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
17 orbits of the Sun — 15,953 million km, that is 20,750 return trips to the Moon; 6,200 rotations of Earth; with the Sun — 123.2 billion km around the Galactic centre, 4.8 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 198 million km away; today it is 245 million km (farther by 1.2×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 24, right at the minimum (8% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on August 4, 2028; Jupiter — in 2033; a full moon exactly on this date — October 13, 2038
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 828″ since that day; the real constellations now sit 24° 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/ap091013.html
NASA APOD
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