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The sky on September 15, 2016 — as it really was

That day the Sun stood in Leo, while the horoscope says "Virgo". The gap is 24.1° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☉–♂ 89.4°♀–♂ 62.4° ☿︎18° ☉︎23° ♃︎1° ♀︎20° ♄︎10° ♂︎22° ☽︎5°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 173.1° · sign Virgo · constellation Leo
  • ☽︎ Moon — 335.7° · sign Pisces · constellation Aquarius
  • ☿︎ Mercury — 168.2° · sign Virgo · constellation Leo
  • ♀︎ Venus — 200.1° · sign Libra · constellation Virgo
  • ♂︎ Mars — 262.5° · sign Sagittarius · constellation Ophiuchus
  • ♃︎ Jupiter — 181.3° · sign Libra · constellation Virgo
  • ♄︎ Saturn — 250.7° · sign Sagittarius · constellation Ophiuchus
  • ☽︎ Moon 98% 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]

    full moon, 98% lit; the Moon was 369,703 km away.

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

    10.1 orbits of the Sun — 9,447 million km, that is 12,288 return trips to the Moon; 3,672 rotations of Earth; with the Sun — 73 billion km around the Galactic centre, 2.8 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 146 million km away; today it is 245 million km (farther by 1.7×).

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

    That day fell in solar cycle 24, on the decline (71% through the cycle).

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

    Mars returns to that day’s point of its orbit on December 29, 2027; Jupiter — in 2028; a full moon exactly on this date — September 15, 2046

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

    The vernal point has shifted 504″ since that day; the real constellations now sit 24.1° 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/ap160915.html

    NASA APOD

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