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The sky on January 21, 1993 — as it really was

That day the Sun stood in Capricornus, while the horoscope says "Aquarius". The gap is 23.8° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♂–♃ 91.9°♃–☽ 92.6°☽–♀ 61.3° ♂︎12° ♃︎14° ☽︎17° ☿︎0° ☉︎1° ♄︎18° ♀︎18°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 301.5° · sign Aquarius · constellation Capricornus
  • ☽︎ Moon — 287.2° · sign Capricorn · constellation Sagittarius
  • ☿︎ Mercury — 300.0° · sign Aquarius · constellation Capricornus
  • ♀︎ Venus — 348.5° · sign Pisces · constellation Aquarius
  • ♂︎ Mars — 102.7° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 194.6° · sign Libra · constellation Virgo
  • ♄︎ Saturn — 318.6° · sign Aquarius · constellation Capricornus
  • ☽︎ Moon 2% 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, 2% lit; the Moon was 397,584 km away.

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

    33.7 orbits of the Sun — 31,671 million km, that is 41,195 return trips to the Moon; 12,309 rotations of Earth; with the Sun — 244.6 billion km around the Galactic centre, 9.4 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 99 million km away; today it is 246 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 22, 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 November 30, 2026; Jupiter — in 2029; a full moon exactly on this date — January 21, 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 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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