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The sky on October 20, 2016 — as it really was

That day the Sun stood in Virgo, while the horoscope says "Libra". The gap is 24.1° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–☉ 119.6° ☽︎27° ♃︎8° ☿︎22° ☉︎27° ♀︎2° ♄︎13° ♂︎15°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 207.5° · sign Libra · constellation Virgo
  • ☽︎ Moon — 87.9° · sign Gemini · constellation Taurus
  • ☿︎ Mercury — 202.6° · sign Libra · constellation Virgo
  • ♀︎ Venus — 242.7° · sign Sagittarius · constellation Scorpius
  • ♂︎ Mars — 285.8° · sign Capricorn · constellation Sagittarius
  • ♃︎ Jupiter — 188.8° · sign Libra · constellation Virgo
  • ♄︎ Saturn — 253.2° · sign Sagittarius · constellation Ophiuchus
  • ☽︎ Moon 75% 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.

  1. The Moon that day [EXACT]

    waning gibbous, 75% lit; the Moon was 367,995 km away.

    astronomy-engine
  2. How far Earth has travelled since [EXACT]

    10 orbits of the Sun — 9,356 million km, that is 12,170 return trips to the Moon; 3,636 rotations of Earth; with the Sun — 72.3 billion km around the Galactic centre, 2.8 light-days.

    29.78 km/s along the orbit; 230 km/s around the Galactic centre
  3. Mars then and now [EXACT]

    On that day Mars was 177 million km away; today it is 245 million km (farther by 1.4×).

    astronomy-engine; checked against JPL Horizons for 2026-09-14
  4. Solar cycle [ESTIMATE]

    That day fell in solar cycle 24, on the decline (72% through the cycle).

    SILSO smoothed minima
  5. When the sky repeats [EXACT]

    Mars returns to that day’s point of its orbit on February 2, 2028; Jupiter — in 2028; a full moon exactly on this date — October 20, 2040

    sidereal periods: Mars 686.98 d, Jupiter 11.862 yr
  6. How far the sky has drifted since [EXACT]

    The vernal point has shifted 504″ since that day; the real constellations now sit 24.1° away from the astrologers’ “signs”.

    precession 50.29″/yr
  7. Picture of the day [EXACT]

    NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap161020.html

    NASA APOD

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