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Deep Partial Eclipse Turned the Moon Reddish Over Argentina

Published estimates differ on how much of the lunar disk entered Earth’s umbra.

Overview

  • The eclipse unfolded in the night of Thursday into the early hours of Friday and peaked around 1:12 a.m. local time on Friday, Aug. 28, when observers in Argentina and across the Americas saw the Moon take on copper and red tones.
  • The event was widely visible from much of the Americas and parts of Europe and Africa and drew public gatherings such as the Planetario Galileo Galilei program in Buenos Aires where people used telescopes and live projections to watch the phases.
  • Weather affected local viewing: the Servicio Meteorológico Nacional warned that the recurring Santa Rosa storm raised chances of clouds and rain in the Buenos Aires metro area and produced uneven visibility across Argentine provinces.
  • A persistent discrepancy remains in technical reports about eclipse depth — NASA and several outlets cite an umbral magnitude near 0.93 (about 93% of the diameter), while Time and Date and other datasets report roughly 0.962–0.963 (about 96% coverage).
  • The Moon’s red color resulted from sunlight filtered and refracted by Earth’s atmosphere into the umbra, and the differing published magnitudes likely reflect use of different data sets, rounding methods or definitions of coverage rather than conflicting observations.