The sky on March 13, 2007 — as it really was
That day the Sun stood in Pisces — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 352.5° · sign Pisces · constellation Pisces
- ☽︎ Moon — 278.3° · sign Capricorn · constellation Sagittarius
- ☿︎ Mercury — 326.8° · sign Aquarius · constellation Capricornus
- ♀︎ Venus — 24.6° · sign Aries · constellation Pisces
- ♂︎ Mars — 311.7° · sign Aquarius · constellation Capricornus
- ♃︎ Jupiter — 258.9° · sign Sagittarius · constellation Ophiuchus
- ♄︎ Saturn — 139.4° · sign Leo · constellation Leo
- ☽︎ Moon 37% 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, 37% lit; the Moon was 385,589 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
19.6 orbits of the Sun — 18,385 million km, that is 23,913 return trips to the Moon; 7,145 rotations of Earth; with the Sun — 142 billion km around the Galactic centre, 5.5 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 303 million km away; today it is 245 million km (closer by 1.2×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 23, on the decline (86% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 20, 2027; Jupiter — in 2031; a full moon exactly on this date — March 13, 2055
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 972″ 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/ap070313.html
NASA APOD
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