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The sky on February 1, 2013 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♄–☉ 91.5° ♃︎6° ☽︎16° ♄︎11° ♀︎29° ☉︎12° ☿︎22° ♂︎29°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 312.8° · sign Aquarius · constellation Capricornus
  • ☽︎ Moon — 196.4° · sign Libra · constellation Virgo
  • ☿︎ Mercury — 322.8° · sign Aquarius · constellation Capricornus
  • ♀︎ Venus — 299.2° · sign Capricorn · constellation Sagittarius
  • ♂︎ Mars — 329.5° · sign Aquarius · constellation Aquarius
  • ♃︎ Jupiter — 66.3° · sign Gemini · constellation Taurus
  • ♄︎ Saturn — 221.3° · sign Scorpio · constellation Libra
  • ☽︎ Moon 72% 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, 72% lit; the Moon was 378,977 km away.

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

    13.7 orbits of the Sun — 12,849 million km, that is 16,714 return trips to the Moon; 4,994 rotations of Earth; with the Sun — 99.2 billion km around the Galactic centre, 3.8 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 343 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 rise to maximum (38% through the cycle).

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

    Mars returns to that day’s point of its orbit on February 19, 2028; Jupiter — in 2037; a full moon exactly on this date — January 31, 2037

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

    The vernal point has shifted 684″ 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/ap130201.html

    NASA APOD

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