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The sky on March 17, 1998 — as it really was

That day the Sun stood in Pisces — sign and constellation agree here.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♂–♀ 59.2°☽–♀ 87.2° ♂︎9° ☿︎14° ♄︎19° ☽︎13° ♀︎10° ♃︎9° ☉︎26°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 356.7° · sign Pisces · constellation Pisces
  • ☽︎ Moon — 223.5° · sign Scorpio · constellation Libra
  • ☿︎ Mercury — 14.8° · sign Aries · constellation Pisces
  • ♀︎ Venus — 310.7° · sign Aquarius · constellation Capricornus
  • ♂︎ Mars — 9.9° · sign Aries · constellation Pisces
  • ♃︎ Jupiter — 339.8° · sign Pisces · constellation Aquarius
  • ♄︎ Saturn — 20.0° · sign Aries · constellation Pisces
  • ☽︎ Moon 84% 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.

  1. The Moon that day [EXACT]

    waning gibbous, 84% lit; the Moon was 403,720 km away.

    astronomy-engine
  2. How far Earth has travelled since [EXACT]

    28.6 orbits of the Sun — 26,834 million km, that is 34,903 return trips to the Moon; 10,429 rotations of Earth; with the Sun — 207.2 billion km around the Galactic centre, 8 light-days.

    29.78 km/s along the orbit; 230 km/s around the Galactic centre
  3. Mars then and now [EXACT]

    On that day Mars was 354 million km away; today it is 245 million km (closer by 1.4×).

    astronomy-engine; checked against JPL Horizons for 2026-09-14
  4. Solar cycle [ESTIMATE]

    That day fell in solar cycle 23, right at the minimum (13% through the cycle).

    SILSO smoothed minima
  5. When the sky repeats [EXACT]

    Mars returns to that day’s point of its orbit on April 20, 2028; Jupiter — in 2034; a full moon exactly on this date — March 17, 2060

    sidereal periods: Mars 686.98 d, Jupiter 11.862 yr
  6. How far the sky has drifted since [EXACT]

    The vernal point has shifted 1,440″ since that day; the real constellations now sit 23.8° away from the astrologers’ “signs”.

    precession 50.29″/yr
  7. Picture of the day [EXACT]

    NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap980317.html

    NASA APOD

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