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The sky on August 20, 1982 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♀–♃ 87.0°♀–♂ 92.7° ♀︎7° ☉︎27° ☽︎15° ☿︎19° ♄︎18° ♃︎4° ♂︎10°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 147.1° · sign Leo · constellation Leo
  • ☽︎ Moon — 165.8° · sign Virgo · constellation Leo
  • ☿︎ Mercury — 169.4° · sign Virgo · constellation Leo
  • ♀︎ Venus — 127.4° · sign Leo · constellation Cancer
  • ♂︎ Mars — 220.1° · sign Scorpio · constellation Libra
  • ♃︎ Jupiter — 214.4° · sign Scorpio · constellation Virgo
  • ♄︎ Saturn — 198.6° · sign Libra · constellation Virgo
  • ☽︎ 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 370,917 km away.

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

    44.1 orbits of the Sun — 41,467 million km, that is 53,938 return trips to the Moon; 16,116 rotations of Earth; with the Sun — 320.3 billion km around the Galactic centre, 12.4 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 211 million km away; today it is 245 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 21, on the decline (62% through the cycle).

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

    Mars returns to that day’s point of its orbit on October 11, 2027; Jupiter — in 2029; a full moon exactly on this date — August 20, 2062

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

    The vernal point has shifted 2,196″ since that day; the real constellations now sit 23.6° away from the astrologers’ “signs”.

    precession 50.29″/yr

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