The sky on February 17, 2023 — as it really was
That day the Sun stood in Aquarius — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 328.5° · sign Aquarius · constellation Aquarius
- ☽︎ Moon — 289.0° · sign Capricorn · constellation Sagittarius
- ☿︎ Mercury — 308.6° · sign Aquarius · constellation Capricornus
- ♀︎ Venus — 356.5° · sign Pisces · constellation Pisces
- ♂︎ Mars — 74.9° · sign Gemini · constellation Taurus
- ♃︎ Jupiter — 9.4° · sign Aries · constellation Cetus
- ♄︎ Saturn — 327.8° · sign Aquarius · constellation Aquarius
- ☽︎ Moon 12% 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 crescent, 12% lit; the Moon was 361,398 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
3.6 orbits of the Sun — 3,414 million km, that is 4,441 return trips to the Moon; 1,327 rotations of Earth; with the Sun — 26.4 billion km around the Galactic centre, 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 154 million km away; today it is 244 million km (farther by 1.6×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 25, on the rise to maximum (31% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 22, 2026; Jupiter — in 2035.
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 180″ since that day; the real constellations now sit 24.2° 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/ap230217.html
NASA APOD
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