Planetary Retrogrades and Shadow Periods, 1950–2050

922 computed retrograde intervals for Mercury through Pluto, selected by retrograde station in 1950–2050 UTC. Includes direct/retrograde station times, tropical signs and shadow periods. Fixed v1 source generated 25 October 2026 using Astronomy Engine 2.1.19. Original dataset · Methodology · Mercury–Venus research · Hugging Face release · Kaggle release. This archive preserves the original v1 CSV, JSON, README, license and manifest byte for byte, plus supplementary citation metadata and a reproducible Python notebook. No personal data. Minute resolution does not establish one-minute physical accuracy. Source intervals may cross year boundaries; a retrograde already underway at the start of 1950 can be omitted. Shadow periods and zodiac signs are astrological conventions. Positional calculations do not validate personal predictions. Data and documentation: CC BY 4.0.