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The sky on May 3, 2021 — as it really was

That day the Sun stood in Aries, while the horoscope says "Taurus". The gap is 24.2° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☉–♄ 90.1°☿–♃ 90.2° ☉︎13° ♀︎23° ☿︎28° ♂︎6° ☽︎9° ♄︎13° ♃︎28°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 43.3° · sign Taurus · constellation Aries
  • ☽︎ Moon — 309.3° · sign Aquarius · constellation Capricornus
  • ☿︎ Mercury — 58.9° · sign Taurus · constellation Taurus
  • ♀︎ Venus — 53.1° · sign Taurus · constellation Aries
  • ♂︎ Mars — 96.1° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 328.7° · sign Aquarius · constellation Aquarius
  • ♄︎ Saturn — 313.2° · sign Aquarius · constellation Capricornus
  • ☽︎ Moon 54% 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]

    last quarter, 54% lit; the Moon was 381,192 km away.

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

    5.4 orbits of the Sun — 5,099 million km, that is 6,633 return trips to the Moon; 1,982 rotations of Earth; with the Sun — 39.4 billion km around the Galactic centre, 1.5 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 305 million km away; today it is 244 million km (closer by 1.3×).

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

    That day fell in solar cycle 25, right at the minimum (14% through the cycle).

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

    Mars returns to that day’s point of its orbit on December 24, 2026; Jupiter — in 2033; a full moon exactly on this date — May 2, 2053

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

    The vernal point has shifted 252″ since that day; the real constellations now sit 24.2° 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/ap210503.html

    NASA APOD

Other dates

2021-05-02 2021-05-04 everyone born May 3
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