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The sky on December 21, 2014 — as it really was

That day the Sun stood in Sagittarius — sign and constellation agree here.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♃–☽ 119.7° ♃︎22° ♄︎29° ☽︎22° ☉︎29° ☿︎6° ♀︎13° ♂︎12°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 269.5° · sign Sagittarius · constellation Sagittarius
  • ☽︎ Moon — 262.0° · sign Sagittarius · constellation Ophiuchus
  • ☿︎ Mercury — 276.9° · sign Capricorn · constellation Sagittarius
  • ♀︎ Venus — 283.6° · sign Capricorn · constellation Sagittarius
  • ♂︎ Mars — 312.8° · sign Aquarius · constellation Capricornus
  • ♃︎ Jupiter — 142.4° · sign Leo · constellation Leo
  • ♄︎ Saturn — 239.8° · sign Scorpio · constellation Libra
  • ☽︎ Moon 1% 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, 1% lit; the Moon was 371,497 km away.

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

    11.8 orbits of the Sun — 11,077 million km, that is 14,408 return trips to the Moon; 4,305 rotations of Earth; with the Sun — 85.5 billion km around the Galactic centre, 3.3 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 287 million km away; today it is 246 million km (closer by 1.2×).

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

    That day fell in solar cycle 24, near maximum (55% through the cycle).

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

    Mars returns to that day’s point of its orbit on February 20, 2028; Jupiter — in 2026; a full moon exactly on this date — December 20, 2029

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

    The vernal point has shifted 576″ 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/ap141221.html

    NASA APOD

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