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last mo.

Deep Partial 'Blood Moon' to Sweep Most of the Americas on Aug. 27–28

Astronomical calculations show Earth’s inner shadow will engulf nearly the entire lunar disk making this the deepest partial eclipse visible until 2028 and leaving the Moon’s final look to local air and light conditions.

During a deep partial eclipse, the majority — but not quite all — of the Moon passes through Earth’s umbra, the darkest part of our planet’s shadow. Credit: Gene Ellison (Flickr, CC BY-NC-ND 2.0)
The Moon during a partial lunar eclipse: a bright crescent on one limb, with the rest of the disc dark inside Earth umbral shadow.
The "Blood Moon" rises during a total lunar eclipse in Quezon City, Metro Manila, Philippines, March 3, 2026.

Overview

  • The very deep partial lunar eclipse takes place the night of Aug. 27–28 with greatest eclipse at about 04:12–04:13 UTC (roughly 12:12 a.m. Eastern Time) according to NASA, TimeandDate and Space.com.
  • Technical measures list an umbral magnitude of 0.930 meaning about 93% of the Moon’s diameter will sit inside Earth’s umbra while obscuration (area covered) is near 96%, which explains the differing percentage figures in coverage.
  • Visibility favors the Americas where most viewers will see all or most of the event; parts of Europe and Africa will catch a partial view near moonset and Pacific regions see it around moonrise depending on local horizon times.
  • The visual result may be a very dark, bitten disk with a bright crescent rather than a uniformly red Moon because the thin sunlit rim can stay hundreds of times brighter; any coppery or red tint depends on local atmospheric clarity and dust levels.
  • Observers need no eye protection to watch the eclipse, binoculars or a small telescope will reveal more detail, and skywatchers should check local contact times and weather since this event follows Aug. 12’s solar eclipse and is the deepest partial visible until Dec. 31, 2028.