The sky on December 6, 2019 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 24.1° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 254.1° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 8.1° · sign Aries · constellation Cetus
- ☿︎ Mercury — 235.9° · sign Scorpio · constellation Libra
- ♀︎ Venus — 283.0° · sign Capricorn · constellation Sagittarius
- ♂︎ Mars — 221.3° · sign Scorpio · constellation Libra
- ♃︎ Jupiter — 270.8° · sign Capricorn · constellation Sagittarius
- ♄︎ Saturn — 288.5° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon 70% 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.
- The Moon that day [EXACT]
waxing gibbous, 70% lit; the Moon was 403,310 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
6.8 orbits of the Sun — 6,420 million km, that is 8,351 return trips to the Moon; 2,495 rotations of Earth; with the Sun — 49.6 billion km around the Galactic centre, 1.9 light-days.
29.78 km/s along the orbit; 230 km/s around the Galactic centre - Mars then and now [EXACT]
On that day Mars was 352 million km away; today it is 244 million km (closer by 1.4×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 25, right at the minimum (0% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on June 15, 2027; Jupiter — in 2031; a full moon exactly on this date — December 6, 2033
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 324″ since that day; the real constellations now sit 24.1° away from the astrologers’ “signs”.
precession 50.29″/yr - Picture of the day [EXACT]
NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap191206.html
NASA APOD
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