The sky on October 21, 2019 — 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 — 207.8° · sign Libra · constellation Virgo
- ☽︎ Moon — 117.4° · sign Cancer · constellation Gemini
- ☿︎ Mercury — 232.2° · sign Scorpio · constellation Libra
- ♀︎ Venus — 225.9° · sign Scorpio · constellation Libra
- ♂︎ Mars — 191.2° · sign Libra · constellation Virgo
- ♃︎ Jupiter — 261.4° · sign Sagittarius · constellation Ophiuchus
- ♄︎ Saturn — 284.8° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon 50% 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]
last quarter, 50% lit; the Moon was 375,551 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
7 orbits of the Sun — 6,535 million km, that is 8,501 return trips to the Moon; 2,540 rotations of Earth; with the Sun — 50.5 billion km around the Galactic centre, 1.9 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 386 million km away; today it is 246 million km (closer by 1.6×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 24, 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 April 30, 2027; Jupiter — in 2031; a full moon exactly on this date — October 21, 2059
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 324″ 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/ap191021.html
NASA APOD
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