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The sky on August 27, 2009 — as it really was

That day the Sun stood in Leo, while the horoscope says "Virgo". The gap is 24.0° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♂–☿ 90.3°♀–☿ 60.4°☉–☽ 90.1° ♂︎1° ♀︎0° ☉︎4° ♄︎22° ☿︎1° ☽︎4° ♃︎20°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 154.4° · sign Virgo · constellation Leo
  • ☽︎ Moon — 244.5° · sign Sagittarius · constellation Scorpius
  • ☿︎ Mercury — 181.4° · sign Libra · constellation Virgo
  • ♀︎ Venus — 121.0° · sign Leo · constellation Cancer
  • ♂︎ Mars — 91.1° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 320.4° · sign Aquarius · constellation Capricornus
  • ♄︎ Saturn — 172.4° · sign Virgo · constellation Leo
  • ☽︎ Moon 50% 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]

    first quarter, 50% lit; the Moon was 396,610 km away.

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

    17.1 orbits of the Sun — 16,076 million km, that is 20,911 return trips to the Moon; 6,248 rotations of Earth; with the Sun — 124.2 billion km around the Galactic centre, 4.8 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 244 million km away; today it is 244 million km (farther by 1×).

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

    That day fell in solar cycle 24, right at the minimum (7% through the cycle).

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

    Mars returns to that day’s point of its orbit on June 18, 2028; Jupiter — in 2033; a full moon exactly on this date — August 26, 2064

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

    The vernal point has shifted 864″ since that day; the real constellations now sit 24° 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/ap090827.html

    NASA APOD

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