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The sky on December 1, 1964 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♂–☽ 58.6°☿–♄ 58.4° ♃︎18° ♂︎12° ♀︎7° ☽︎11° ☉︎9° ☿︎0° ♄︎29°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 249.3° · sign Sagittarius · constellation Ophiuchus
  • ☽︎ Moon — 221.1° · sign Scorpio · constellation Libra
  • ☿︎ Mercury — 270.7° · sign Capricorn · constellation Sagittarius
  • ♀︎ Venus — 217.9° · sign Scorpio · constellation Libra
  • ♂︎ Mars — 162.4° · sign Virgo · constellation Leo
  • ♃︎ Jupiter — 48.7° · sign Taurus · constellation Aries
  • ♄︎ Saturn — 329.1° · sign Aquarius · constellation Aquarius
  • ☽︎ Moon 6% 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 crescent, 6% lit; the Moon was 398,524 km away.

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

    61.8 orbits of the Sun — 58,119 million km, that is 75,597 return trips to the Moon; 22,588 rotations of Earth; with the Sun — 448.9 billion km around the Galactic centre, 17.3 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 205 million km away; today it is 244 million km (farther by 1.2×).

    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 (1% through the cycle).

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

    Mars returns to that day’s point of its orbit on December 26, 2026; Jupiter — in 2035; a full moon exactly on this date — November 30, 2039

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

    The vernal point has shifted 3,096″ since that day; the real constellations now sit 23.4° away from the astrologers’ “signs”.

    precession 50.29″/yr

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