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The sky on July 19, 1966 — as it really was

That day the Sun stood in Gemini, while the horoscope says "Cancer". The gap is 23.4° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♀–♄ 87.7° ♀︎27° ♂︎5° ♃︎16° ☉︎26° ☿︎10° ☽︎14° ♄︎29°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 116.4° · sign Cancer · constellation Gemini
  • ☽︎ Moon — 134.6° · sign Leo · constellation Cancer
  • ☿︎ Mercury — 130.6° · sign Leo · constellation Cancer
  • ♀︎ Venus — 87.3° · sign Gemini · constellation Orion
  • ♂︎ Mars — 95.6° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 106.2° · sign Cancer · constellation Gemini
  • ♄︎ Saturn — 359.6° · sign Pisces · constellation Pisces
  • ☽︎ Moon 3% 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, 3% lit; the Moon was 362,023 km away.

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

    60.2 orbits of the Sun — 56,588 million km, that is 73,605 return trips to the Moon; 21,993 rotations of Earth; with the Sun — 437 billion km around the Galactic centre, 16.9 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 368 million km away; today it is 244 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 20, right at the minimum (16% through the cycle).

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

    Mars returns to that day’s point of its orbit on August 12, 2028; Jupiter — in 2037; a full moon exactly on this date — July 18, 2027

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

    The vernal point has shifted 3,024″ since that day; the real constellations now sit 23.4° away from the astrologers’ “signs”.

    precession 50.29″/yr

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