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The sky on December 28, 2016 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♃–♄ 60.2°♃–♀ 122.9°♄–♀ 62.7°☉–♂ 59.7°☿–♂ 59.0° ♃︎20° ♄︎20° ☽︎28° ☉︎7° ☿︎7° ♀︎23° ♂︎6°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 277.2° · sign Capricorn · constellation Sagittarius
  • ☽︎ Moon — 268.4° · sign Sagittarius · constellation Sagittarius
  • ☿︎ Mercury — 277.9° · sign Capricorn · constellation Sagittarius
  • ♀︎ Venus — 323.7° · sign Aquarius · constellation Capricornus
  • ♂︎ Mars — 336.9° · sign Pisces · constellation Aquarius
  • ♃︎ Jupiter — 200.8° · sign Libra · constellation Virgo
  • ♄︎ Saturn — 261.0° · sign Sagittarius · constellation Ophiuchus
  • ☽︎ 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 401,544 km away.

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

    9.8 orbits of the Sun — 9,179 million km, that is 11,939 return trips to the Moon; 3,567 rotations of Earth; with the Sun — 70.9 billion km around the Galactic centre, 2.7 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 242 million km away; today it is 245 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, on the decline (73% through the cycle).

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

    Mars returns to that day’s point of its orbit on April 11, 2028; Jupiter — in 2028; a full moon exactly on this date — December 28, 2050

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

    The vernal point has shifted 468″ 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/ap161228.html

    NASA APOD

Other dates

2016-12-27 2016-12-29 everyone born December 28
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