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The sky on August 15, 1964 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♃–☉ 88.0°♃–☽ 178.0° ♃︎24° ♀︎7° ♂︎10° ☉︎22° ☿︎17° ☽︎26° ♄︎2°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 142.7° · sign Leo · constellation Leo
  • ☽︎ Moon — 236.7° · sign Scorpio · constellation Libra
  • ☿︎ Mercury — 167.2° · sign Virgo · constellation Leo
  • ♀︎ Venus — 97.7° · sign Cancer · constellation Gemini
  • ♂︎ Mars — 100.4° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 54.7° · sign Taurus · constellation Taurus
  • ♄︎ Saturn — 332.4° · sign Pisces · constellation Aquarius
  • ☽︎ Moon 54% 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]

    first quarter, 54% lit; the Moon was 402,086 km away.

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

    62.1 orbits of the Sun — 58,397 million km, that is 75,959 return trips to the Moon; 22,696 rotations of Earth; with the Sun — 451 billion km around the Galactic centre, 17.4 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 317 million km away; today it is 244 million km (closer by 1.3×).

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

    That day fell in solar cycle 19, on the decline (99% 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 2035; a full moon exactly on this date — August 14, 2038

    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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