The sky on October 17, 1998 — as it really was
That day the Sun stood in Virgo, while the horoscope says "Libra". The gap is 23.8° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 203.9° · sign Libra · constellation Virgo
- ☽︎ Moon — 172.0° · sign Virgo · constellation Leo
- ☿︎ Mercury — 218.3° · sign Scorpio · constellation Libra
- ♀︎ Venus — 200.7° · sign Libra · constellation Virgo
- ♂︎ Mars — 156.1° · sign Virgo · constellation Leo
- ♃︎ Jupiter — 349.4° · sign Pisces · constellation Aquarius
- ♄︎ Saturn — 30.7° · sign Taurus · constellation Pisces
- ☽︎ Moon 8% 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, 8% lit; the Moon was 402,148 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
28 orbits of the Sun — 26,283 million km, that is 34,187 return trips to the Moon; 10,215 rotations of Earth; with the Sun — 203 billion km around the Galactic centre, 7.8 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 320 million km away; today it is 245 million km (closer by 1.3×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 23, right at the minimum (18% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on January 3, 2027; Jupiter — in 2034; a full moon exactly on this date — October 17, 2035
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 1,404″ since that day; the real constellations now sit 23.8° 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/ap981017.html
NASA APOD
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