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The sky on September 18, 1994 — as it really was

That day the Sun stood in Virgo — sign and constellation agree here.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♂–☿ 89.6°♀–♄ 119.5°♀–☽ 121.6°♃–☽ 117.1° ♂︎20° ☉︎25° ☿︎20° ♀︎8° ♃︎12° ♄︎7° ☽︎9°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 175.3° · sign Virgo · constellation Virgo
  • ☽︎ Moon — 339.9° · sign Pisces · constellation Aquarius
  • ☿︎ Mercury — 200.2° · sign Libra · constellation Virgo
  • ♀︎ Venus — 218.3° · sign Scorpio · constellation Virgo
  • ♂︎ Mars — 110.6° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 222.7° · sign Scorpio · constellation Libra
  • ♄︎ Saturn — 337.8° · sign Pisces · constellation Aquarius
  • ☽︎ Moon 98% 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]

    full moon, 98% lit; the Moon was 392,276 km away.

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

    32 orbits of the Sun — 30,120 million km, that is 39,177 return trips to the Moon; 11,706 rotations of Earth; with the Sun — 232.6 billion km around the Galactic centre, 9 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 248 million km away; today it is 243 million km (closer by 1×).

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

    That day fell in solar cycle 22, 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 July 27, 2028; Jupiter — in 2030; a full moon exactly on this date — September 17, 2035

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

    The vernal point has shifted 1,584″ since that day; the real constellations now sit 23.8° away from the astrologers’ “signs”.

    precession 50.29″/yr

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