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The sky on March 13, 1997 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–☉ 59.9°☽–☿ 58.1° ♄︎8° ☽︎22° ♂︎28° ♃︎11° ♀︎17° ☉︎22° ☿︎24°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 353.0° · sign Pisces · constellation Pisces
  • ☽︎ Moon — 52.8° · sign Taurus · constellation Taurus
  • ☿︎ Mercury — 354.7° · sign Pisces · constellation Aquarius
  • ♀︎ Venus — 347.9° · sign Pisces · constellation Aquarius
  • ♂︎ Mars — 178.3° · sign Virgo · constellation Virgo
  • ♃︎ Jupiter — 311.4° · sign Aquarius · constellation Capricornus
  • ♄︎ Saturn — 8.1° · sign Aries · constellation Cetus
  • ☽︎ Moon 25% 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]

    waxing crescent, 25% lit; the Moon was 378,449 km away.

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

    29.6 orbits of the Sun — 27,781 million km, that is 36,135 return trips to the Moon; 10,797 rotations of Earth; with the Sun — 214.6 billion km around the Galactic centre, 8.3 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 99 million km away; today it is 246 million km (farther by 2.5×).

    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 (5% through the cycle).

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

    Mars returns to that day’s point of its orbit on April 17, 2027; Jupiter — in 2033; a full moon exactly on this date — March 13, 2055

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

    The vernal point has shifted 1,476″ 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/ap970313.html

    NASA APOD

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