The sky on December 2, 2007 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 24.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 249.9° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 170.9° · sign Virgo · constellation Leo
- ☿︎ Mercury — 241.5° · sign Sagittarius · constellation Libra
- ♀︎ Venus — 206.4° · sign Libra · constellation Virgo
- ♂︎ Mars — 100.4° · sign Cancer · constellation Gemini
- ♃︎ Jupiter — 266.3° · sign Sagittarius · constellation Ophiuchus
- ♄︎ Saturn — 158.3° · sign Virgo · constellation Leo
- ☽︎ Moon 41% 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, 41% lit; the Moon was 397,352 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
18.8 orbits of the Sun — 17,708 million km, that is 23,033 return trips to the Moon; 6,882 rotations of Earth; with the Sun — 136.8 billion km around the Galactic centre, 5.3 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 92 million km away; today it is 244 million km (farther by 2.6×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 23, on the decline (92% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on August 10, 2028; Jupiter — in 2031; a full moon exactly on this date — December 2, 2028
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 936″ 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/ap071202.html
NASA APOD
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