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The sky on July 22, 2001 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♄︎11° ♀︎18° ♃︎2° ☿︎14° ☉︎29° ☽︎23° ♂︎15°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 119.7° · sign Cancer · constellation Cancer
  • ☽︎ Moon — 143.4° · sign Leo · constellation Leo
  • ☿︎ Mercury — 104.4° · sign Cancer · constellation Gemini
  • ♀︎ Venus — 78.6° · sign Gemini · constellation Taurus
  • ♂︎ Mars — 255.2° · sign Sagittarius · constellation Ophiuchus
  • ♃︎ Jupiter — 92.1° · sign Cancer · constellation Gemini
  • ♄︎ Saturn — 71.3° · sign Gemini · constellation Taurus
  • ☽︎ Moon 4% 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, 4% lit; the Moon was 359,378 km away.

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

    25.2 orbits of the Sun — 23,685 million km, that is 30,807 return trips to the Moon; 9,205 rotations of Earth; with the Sun — 182.9 billion km around the Galactic centre, 7.1 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 77 million km away; today it is 245 million km (farther by 3.2×).

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

    That day fell in solar cycle 23, on the rise to maximum (40% through the cycle).

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

    Mars returns to that day’s point of its orbit on November 21, 2027; Jupiter — in 2037; a full moon exactly on this date — July 22, 2043

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

    The vernal point has shifted 1,260″ since that day; the real constellations now sit 23.9° 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/ap010722.html

    NASA APOD

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