The sky on January 13, 2012 — 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 — 292.7° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon — 165.2° · sign Virgo · constellation Leo
- ☿︎ Mercury — 277.7° · sign Capricorn · constellation Sagittarius
- ♀︎ Venus — 329.1° · sign Aquarius · constellation Aquarius
- ♂︎ Mars — 172.4° · sign Virgo · constellation Leo
- ♃︎ Jupiter — 31.0° · sign Taurus · constellation Aries
- ♄︎ Saturn — 209.0° · sign Libra · constellation Virgo
- ☽︎ Moon 80% 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]
waning gibbous, 80% lit; the Moon was 374,353 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
14.7 orbits of the Sun — 13,837 million km, that is 17,999 return trips to the Moon; 5,378 rotations of Earth; with the Sun — 106.9 billion km around the Galactic centre, 4.1 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 139 million km away; today it is 246 million km (farther by 1.8×).
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 (28% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on January 30, 2027; Jupiter — in 2036; a full moon exactly on this date — January 13, 2036
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 720″ 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/ap120113.html
NASA APOD
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