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The sky on December 5, 1960 — as it really was

That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 23.3° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–♃ 179.0°♂–♄ 179.5°☿–♀ 57.5° ☽︎9° ♂︎17° ☿︎26° ☉︎13° ♃︎8° ♄︎16° ♀︎24°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 253.4° · sign Sagittarius · constellation Ophiuchus
  • ☽︎ Moon — 99.1° · sign Cancer · constellation Gemini
  • ☿︎ Mercury — 236.7° · sign Scorpio · constellation Libra
  • ♀︎ Venus — 294.2° · sign Capricorn · constellation Sagittarius
  • ♂︎ Mars — 107.1° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 278.0° · sign Capricorn · constellation Sagittarius
  • ♄︎ Saturn — 286.6° · sign Capricorn · constellation Sagittarius
  • ☽︎ Moon 95% 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 gibbous, 95% lit; the Moon was 404,521 km away.

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

    65.8 orbits of the Sun — 61,870 million km, that is 80,476 return trips to the Moon; 24,046 rotations of Earth; with the Sun — 477.8 billion km around the Galactic centre, 18.4 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 97 million km away; today it is 244 million km (farther by 2.5×).

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

    That day fell in solar cycle 19, on the decline (64% through the cycle).

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

    Mars returns to that day’s point of its orbit on August 21, 2028; Jupiter — in 2031; a full moon exactly on this date — December 4, 2044

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

    The vernal point has shifted 3,312″ since that day; the real constellations now sit 23.3° away from the astrologers’ “signs”.

    precession 50.29″/yr

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