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The sky on August 20, 1941 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♄–☽ 60.6°♄–☉ 88.9°♄–☿ 90.4°♄–♀ 121.2°☽–♀ 60.6° ♂︎21° ♄︎28° ♃︎17° ☽︎28° ☉︎27° ☿︎28° ♀︎29°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 147.1° · sign Leo · constellation Leo
  • ☽︎ Moon — 118.8° · sign Cancer · constellation Cancer
  • ☿︎ Mercury — 148.6° · sign Leo · constellation Leo
  • ♀︎ Venus — 179.4° · sign Virgo · constellation Virgo
  • ♂︎ Mars — 21.7° · sign Aries · constellation Pisces
  • ♃︎ Jupiter — 77.5° · sign Gemini · constellation Taurus
  • ♄︎ Saturn — 58.1° · sign Taurus · constellation Taurus
  • ☽︎ 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 386,690 km away.

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

    85.1 orbits of the Sun — 80,000 million km, that is 104,058 return trips to the Moon; 31,092 rotations of Earth; with the Sun — 617.9 billion km around the Galactic centre, 23.9 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 79 million km away; today it is 244 million km (farther by 3.1×).

    astronomy-engine; checked against JPL Horizons for 2026-09-14
  4. When the sky repeats [EXACT]

    Mars returns to that day’s point of its orbit on February 26, 2028; Jupiter — in 2036; a full moon exactly on this date — August 20, 2062

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

    The vernal point has shifted 4,284″ since that day; the real constellations now sit 23° away from the astrologers’ “signs”.

    precession 50.29″/yr

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