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The sky on September 16, 2003 — as it really was

That day the Sun stood in Leo, while the horoscope says "Virgo". The gap is 23.9° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–♀ 122.8°☽–♂ 87.4°♄–☿ 61.5° ☽︎28° ♄︎11° ♃︎4° ☿︎13° ☉︎23° ♀︎1° ♂︎0°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 173.2° · sign Virgo · constellation Leo
  • ☽︎ Moon — 58.3° · sign Taurus · constellation Taurus
  • ☿︎ Mercury — 163.4° · sign Virgo · constellation Leo
  • ♀︎ Venus — 181.0° · sign Libra · constellation Virgo
  • ♂︎ Mars — 330.9° · sign Pisces · constellation Aquarius
  • ♃︎ Jupiter — 154.3° · sign Virgo · constellation Leo
  • ♄︎ Saturn — 101.8° · sign Cancer · constellation Gemini
  • ☽︎ Moon 71% 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, 71% lit; the Moon was 404,694 km away.

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

    23.1 orbits of the Sun — 21,664 million km, that is 28,179 return trips to the Moon; 8,420 rotations of Earth; with the Sun — 167.3 billion km around the Galactic centre, 6.5 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 60 million km away; today it is 245 million km (farther by 4.1×).

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

    That day fell in solar cycle 23, near maximum (58% through the cycle).

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

    Mars returns to that day’s point of its orbit on February 28, 2028; Jupiter — in 2027; a full moon exactly on this date — September 15, 2027

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

    The vernal point has shifted 1,152″ since that day; the real constellations now sit 23.9° away from the astrologers’ “signs”.

    precession 50.29″/yr
  7. Picture of the day [EXACT]

    NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap030916.html

    NASA APOD

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