The sky on October 13, 2015 — 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 — 199.8° · sign Libra · constellation Virgo
- ☽︎ Moon — 205.2° · sign Libra · constellation Virgo
- ☿︎ Mercury — 182.2° · sign Libra · constellation Virgo
- ♀︎ Venus — 154.1° · sign Virgo · constellation Leo
- ♂︎ Mars — 161.4° · sign Virgo · constellation Leo
- ♃︎ Jupiter — 163.3° · sign Virgo · constellation Leo
- ♄︎ Saturn — 242.2° · sign Sagittarius · constellation Libra
- ☽︎ Moon 0% 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]
new moon, 0% lit; the Moon was 405,128 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
11 orbits of the Sun — 10,315 million km, that is 13,417 return trips to the Moon; 4,009 rotations of Earth; with the Sun — 79.7 billion km around the Galactic centre, 3.1 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 347 million km away; today it is 245 million km (closer by 1.4×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 24, on the decline (62% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on January 25, 2027; Jupiter — in 2027; 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 540″ 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/ap151013.html
NASA APOD
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