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The sky on October 19, 2017 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–♄ 60.7°☉–♄ 57.2° ♂︎27° ♀︎6° ☽︎22° ☉︎26° ♃︎1° ☿︎3° ♄︎23°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 206.3° · sign Libra · constellation Virgo
  • ☽︎ Moon — 202.8° · sign Libra · constellation Virgo
  • ☿︎ Mercury — 213.5° · sign Scorpio · constellation Virgo
  • ♀︎ Venus — 186.3° · sign Libra · constellation Virgo
  • ♂︎ Mars — 177.9° · sign Virgo · constellation Virgo
  • ♃︎ Jupiter — 211.9° · sign Scorpio · constellation Virgo
  • ♄︎ Saturn — 263.5° · sign Sagittarius · constellation Ophiuchus
  • ☽︎ 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.

  1. The Moon that day [EXACT]

    new moon, 0% lit; the Moon was 392,464 km away.

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

    9 orbits of the Sun — 8,420 million km, that is 10,952 return trips to the Moon; 3,272 rotations of Earth; with the Sun — 65 billion km around the Galactic centre, 2.5 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 370 million km away; today it is 245 million km (closer by 1.5×).

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

    That day fell in solar cycle 24, on the decline (81% through the cycle).

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

    Mars returns to that day’s point of its orbit on March 16, 2027; Jupiter — in 2029; a full moon exactly on this date — October 18, 2032

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

    The vernal point has shifted 432″ 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/ap171019.html

    NASA APOD

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