The sky on January 29, 2009 — as it really was
That day the Sun stood in Capricornus, while the horoscope says "Aquarius". The gap is 24.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 309.7° · sign Aquarius · constellation Capricornus
- ☽︎ Moon — 345.5° · sign Pisces · constellation Pisces
- ☿︎ Mercury — 292.3° · sign Capricorn · constellation Sagittarius
- ♀︎ Venus — 356.0° · sign Pisces · constellation Pisces
- ♂︎ Mars — 295.2° · sign Capricorn · constellation Sagittarius
- ♃︎ Jupiter — 305.6° · sign Aquarius · constellation Capricornus
- ♄︎ Saturn — 171.0° · sign Virgo · constellation Leo
- ☽︎ Moon 10% 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 crescent, 10% lit; the Moon was 393,149 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
17.7 orbits of the Sun — 16,616 million km, that is 21,613 return trips to the Moon; 6,458 rotations of Earth; with the Sun — 128.3 billion km around the Galactic centre, 5 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 353 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, right at the minimum (1% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 21, 2027; Jupiter — in 2033; a full moon exactly on this date — January 29, 2040
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 864″ 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/ap090129.html
NASA APOD
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