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The sky on October 13, 2015 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♀–♄ 88.1°☿–♄ 60.0° ♀︎4° ♂︎11° ♃︎13° ☿︎2° ☉︎19° ☽︎25° ♄︎2°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 199.8° · sign Libra · constellation Virgo
  • ☽︎ Moon — 205.2° · sign Libra · constellation Virgo
  • ☿︎ Mercury — 182.2° · sign Libra · constellation Virgo
  • ♀︎ Venus — 154.1° · sign Virgo · constellation Leo
  • ♂︎ Mars — 161.4° · sign Virgo · constellation Leo
  • ♃︎ Jupiter — 163.3° · sign Virgo · constellation Leo
  • ♄︎ Saturn — 242.2° · sign Sagittarius · constellation Libra
  • ☽︎ Moon 0% 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, 0% lit; the Moon was 405,128 km away.

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

    11 orbits of the Sun — 10,315 million km, that is 13,417 return trips to the Moon; 4,009 rotations of Earth; with the Sun — 79.7 billion km around the Galactic centre, 3.1 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 347 million km away; today it is 245 million km (closer by 1.4×).

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

    That day fell in solar cycle 24, on the decline (62% through the cycle).

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

    Mars returns to that day’s point of its orbit on January 25, 2027; Jupiter — in 2027; a full moon exactly on this date — October 13, 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 540″ 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/ap151013.html

    NASA APOD

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