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The sky on October 30, 1997 — as it really was

That day the Sun stood in Virgo, while the horoscope says "Scorpio". The gap is 23.8° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♄–♃ 62.5°☽–♀ 57.1° ♄︎15° ☽︎26° ☉︎7° ☿︎17° ♂︎22° ♀︎23° ♃︎12°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 217.1° · sign Scorpio · constellation Virgo
  • ☽︎ Moon — 206.8° · sign Libra · constellation Virgo
  • ☿︎ Mercury — 227.5° · sign Scorpio · constellation Libra
  • ♀︎ Venus — 264.0° · sign Sagittarius · constellation Ophiuchus
  • ♂︎ Mars — 262.7° · sign Sagittarius · constellation Ophiuchus
  • ♃︎ Jupiter — 312.9° · sign Aquarius · constellation Capricornus
  • ♄︎ Saturn — 15.4° · sign Aries · constellation Pisces
  • ☽︎ Moon 1% 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, 1% lit; the Moon was 401,626 km away.

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

    28.9 orbits of the Sun — 27,188 million km, that is 35,364 return trips to the Moon; 10,567 rotations of Earth; with the Sun — 210 billion km around the Galactic centre, 8.1 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 287 million km away; today it is 245 million km (closer by 1.2×).

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

    That day fell in solar cycle 23, right at the minimum (10% through the cycle).

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

    Mars returns to that day’s point of its orbit on December 4, 2027; Jupiter — in 2033; a full moon exactly on this date — October 30, 2031

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

    The vernal point has shifted 1,440″ since that day; the real constellations now sit 23.8° 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/ap971030.html

    NASA APOD

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