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The sky on August 21, 1992 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–☉ 89.0°♂–♀ 90.6°♂–♃ 92.4°♂–♄ 122.8° ☽︎29° ♂︎16° ☿︎10° ☉︎28° ♀︎17° ♃︎19° ♄︎14°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 148.7° · sign Leo · constellation Leo
  • ☽︎ Moon — 59.7° · sign Taurus · constellation Taurus
  • ☿︎ Mercury — 130.2° · sign Leo · constellation Cancer
  • ♀︎ Venus — 167.5° · sign Virgo · constellation Leo
  • ♂︎ Mars — 76.9° · sign Gemini · constellation Taurus
  • ♃︎ Jupiter — 169.3° · sign Virgo · constellation Leo
  • ♄︎ Saturn — 314.1° · sign Aquarius · constellation Capricornus
  • ☽︎ Moon 49% 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]

    last quarter, 49% lit; the Moon was 383,498 km away.

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

    34.1 orbits of the Sun — 32,064 million km, that is 41,707 return trips to the Moon; 12,462 rotations of Earth; with the Sun — 247.6 billion km around the Galactic centre, 9.6 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 208 million km away; today it is 246 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 22, on the decline (60% through the cycle).

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

    Mars returns to that day’s point of its orbit on May 17, 2028; Jupiter — in 2028; a full moon exactly on this date — August 21, 2032

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

    The vernal point has shifted 1,692″ since that day; the real constellations now sit 23.8° away from the astrologers’ “signs”.

    precession 50.29″/yr

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