The sky on January 6, 2013 — as it really was
That day the Sun stood in Sagittarius, while the horoscope says "Capricorn". The gap is 24.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 286.3° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon — 213.4° · sign Scorpio · constellation Virgo
- ☿︎ Mercury — 279.2° · sign Capricorn · constellation Sagittarius
- ♀︎ Venus — 266.6° · sign Sagittarius · constellation Sagittarius
- ♂︎ Mars — 309.0° · sign Aquarius · constellation Capricornus
- ♃︎ Jupiter — 67.3° · sign Gemini · constellation Taurus
- ♄︎ Saturn — 220.0° · sign Scorpio · constellation Libra
- ☽︎ Moon 35% 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]
last quarter, 35% lit; the Moon was 370,865 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
13.7 orbits of the Sun — 12,916 million km, that is 16,800 return trips to the Moon; 5,020 rotations of Earth; with the Sun — 99.8 billion km around the Galactic centre, 3.9 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 335 million km away; today it is 245 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 24, on the rise to maximum (37% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on January 24, 2028; Jupiter — in 2037; a full moon exactly on this date — January 6, 2042
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - 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 - Picture of the day [EXACT]
NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap130106.html
NASA APOD
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