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The sky on January 1, 2001 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♄–♀ 87.1°♄–☽ 59.8° ♄︎24° ♃︎2° ♂︎5° ☉︎11° ☿︎15° ♀︎27° ☽︎24°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 281.1° · sign Capricorn · constellation Sagittarius
  • ☽︎ Moon — 354.8° · sign Pisces · constellation Aquarius
  • ☿︎ Mercury — 285.1° · sign Capricorn · constellation Sagittarius
  • ♀︎ Venus — 327.5° · sign Aquarius · constellation Aquarius
  • ♂︎ Mars — 215.2° · sign Scorpio · constellation Virgo
  • ♃︎ Jupiter — 62.2° · sign Gemini · constellation Taurus
  • ♄︎ Saturn — 54.6° · sign Taurus · constellation Taurus
  • ☽︎ Moon 36% 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, 36% lit; the Moon was 398,872 km away.

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

    25.8 orbits of the Sun — 24,205 million km, that is 31,484 return trips to the Moon; 9,407 rotations of Earth; with the Sun — 186.9 billion km around the Galactic centre, 7.2 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 267 million km away; today it is 245 million km (closer by 1.1×).

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

    That day fell in solar cycle 23, on the rise to maximum (36% through the cycle).

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

    Mars returns to that day’s point of its orbit on May 3, 2027; Jupiter — in 2037; a full moon exactly on this date — December 31, 2028

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

    The vernal point has shifted 1,296″ 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/ap010101.html

    NASA APOD

Other dates

2000-12-31 2001-01-02 everyone born January 1
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