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Astrology · Reference · Ephemeris

Daily ephemeris — May 2021

Planet positions for every day of the month, sampled at noon UT. Computed live from VSOP87D + ELP2000 ephemerides. Navigate any month forward or back; data is consistent with the free Birth Chart and Sky Map tools.

Day☉ Sun☽ Moon☿ Mer♀ Ven♂ Mar♃ Jup♄ Sat♅ Ura♆ Nep♇ Plu
111Ta11Cp25Ta20Ta 4Cn28Aq13Aq10Ta22Pi26Cp℞
212Ta25Cp27Ta21Ta 5Cn28Aq13Aq10Ta22Pi26Cp℞
313Ta 9Aq28Ta23Ta 6Cn28Aq13Aq10Ta22Pi26Cp℞
414Ta22Aq 0Ge24Ta 6Cn28Aq13Aq10Ta22Pi26Cp℞
515Ta 5Pi 2Ge25Ta 7Cn28Aq13Aq10Ta22Pi26Cp℞
616Ta17Pi 4Ge26Ta 7Cn29Aq13Aq11Ta22Pi26Cp℞
717Ta 0Ar 5Ge28Ta 8Cn29Aq13Aq11Ta22Pi26Cp℞
818Ta12Ar 7Ge29Ta 9Cn29Aq13Aq11Ta22Pi26Cp℞
919Ta24Ar 8Ge 0Ge 9Cn29Aq13Aq11Ta22Pi26Cp℞
1020Ta 6Ta10Ge 1Ge10Cn29Aq13Aq11Ta22Pi26Cp℞
1121Ta17Ta11Ge 2Ge10Cn29Aq13Aq11Ta22Pi26Cp℞
1221Ta29Ta13Ge 4Ge11Cn29Aq13Aq11Ta22Pi26Cp℞
1322Ta11Ge14Ge 5Ge12Cn29Aq13Aq11Ta22Pi26Cp℞
1423Ta23Ge15Ge 6Ge12Cn 0Pi13Aq11Ta22Pi26Cp℞
1524Ta 5Cn16Ge 7Ge13Cn 0Pi13Aq11Ta22Pi26Cp℞
1625Ta17Cn17Ge 9Ge14Cn 0Pi13Aq11Ta22Pi26Cp℞
1726Ta29Cn18Ge10Ge14Cn 0Pi13Aq11Ta22Pi26Cp℞
1827Ta12Le19Ge11Ge15Cn 0Pi13Aq11Ta22Pi26Cp℞
1928Ta25Le20Ge12Ge15Cn 0Pi13Aq11Ta22Pi26Cp℞
2029Ta 8Vi21Ge14Ge16Cn 0Pi13Aq11Ta22Pi26Cp℞
21 0Ge22Vi21Ge15Ge17Cn 0Pi13Aq11Ta22Pi26Cp℞
22 1Ge 6Li22Ge16Ge17Cn 0Pi13Aq11Ta22Pi26Cp℞
23 2Ge20Li23Ge17Ge18Cn 0Pi13Aq℞11Ta22Pi26Cp℞
24 3Ge 5Sc23Ge18Ge18Cn 1Pi13Aq℞12Ta22Pi26Cp℞
25 4Ge20Sc23Ge20Ge19Cn 1Pi13Aq℞12Ta22Pi26Cp℞
26 5Ge 5Sg24Ge21Ge20Cn 1Pi13Aq℞12Ta22Pi26Cp℞
27 6Ge21Sg24Ge22Ge20Cn 1Pi13Aq℞12Ta22Pi26Cp℞
28 7Ge 5Cp24Ge23Ge21Cn 1Pi13Aq℞12Ta22Pi26Cp℞
29 8Ge20Cp24Ge25Ge21Cn 1Pi13Aq℞12Ta23Pi26Cp℞
30 9Ge 4Aq24Ge℞26Ge22Cn 1Pi13Aq℞12Ta23Pi26Cp℞
3110Ge18Aq24Ge℞27Ge23Cn 1Pi13Aq℞12Ta23Pi26Cp℞

Reading the table

  • Format: degree + sign abbreviation. 15Le = 15° Leo.
  • ℞ = retrograde — the planet appears to move backwards through the zodiac that day.
  • highlighted = station day, the moment a planet stops and reverses direction (or vice versa). The most-watched single days in any month.

Common questions

About the ephemeris

What is an ephemeris?

A table of planetary positions over time. The classical paper ephemeris (Raphael's, Rosicrucian, Swiss Ephemeris) lists each planet's longitude on each day of the year — the working tool astrologers use to plan elections, time transits, and check past or future configurations. This page reproduces that data live from arcsecond-grade ephemerides.

Why noon UT?

The classical convention. The slow planets (Jupiter through Pluto) barely move in 12 hours, so noon-sampling captures their position for the whole day with negligible error. The Moon moves ~6.5° in 12 hours (about a quarter of a sign), so the Moon column is most accurate at noon UT specifically — for an exact Moon position at any moment in your local time, use the Sky Map tool.

How do I read each cell?

Each cell shows the planet's degree-in-sign and the sign abbreviation. "15Le" = 15° Leo. The ℞ marker means retrograde — the planet appears to move backwards through the zodiac on that day. Sign-changes (ingresses) appear as a transition between two adjacent cells; the exact ingress moment is in our Sky Now or Lunar Calendar pages.

Why are some cells highlighted?

We highlight the day each planet first appears retrograde or first turns direct in the displayed month — the stations. These are the most-watched days in any month: a planet's station is when it's stopped relative to the stars, and astrologers read the station as a focused activation of the planet's themes for the week or two surrounding it.

How accurate is this?

Arcsecond. We use VSOP87D for the planets and a truncated ELP2000 lunar model with deltaT correction. Same engine that computes the free Birth Chart, Sky Map, and Transit Forecast. Time-zone is UT (universal time); convert to your local time-zone if you need a same-day local read.

Can I use this to plan elections?

Yes — the daily ephemeris is the working table for Hellenistic and modern Western election work. Pair with the Muhurta tool (Vedic auspicious-time scoring), the Choghadiya page (Vedic time windows), and the Lunar Calendar (Moon phases + sign-ingresses) for a full election workflow.

Computation

Each cell is a live engine call cached for 24 hours: VSOP87D for Mercury–Neptune, an in-house DOPRI8 8(7) integrator for Pluto, and a truncated ELP2000 lunar model with deltaT correction for the Moon. Sub-arcsecond accurate. Sampled at 12:00 UT. Retrograde flags come from the engine’s direction-of-motion check, not a calendar approximation; station days are detected from adjacent-day flag flips.