Partial Lunar Eclipse Will Appear Over U.S. October 5

A lunar eclipse will occur on October 5, 2026, offering clear viewing conditions across the eastern United States.

Updated on Oct. 5, 2026 in Space

A partially eclipsed moon displays a reddish-brown shadow across its surface set against a dark starry sky. — Observers in the eastern United States will have a clear view of a partial lunar eclipse on October 5, 2026, as Earth casts a red shadow across the moon. AI Illustration. Upload story photo >

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Do you plan to watch the partial lunar eclipse tonight?

A partial lunar eclipse from the Saros 138 series is set to occur on October 5, 2026. Observers in the eastern United States will be positioned to view the moon as Earth blocks direct sunlight, casting a red hue across the lunar surface.

Why it matters

This celestial event marks a rare opportunity to observe the Saros 138 sequence, which follows a predictable orbital mechanics cycle. The next iteration of this specific partial eclipse series will not return until 2044.

The eclipse begins at 9:38 pm Central time and reaches its peak at 11:12 pm. During this phase, Earth's shadow obscures the lunar disk, preventing a full moon appearance while shifting the reflected light to red.

The details

The phenomenon occurs when the Sun, Earth, and moon align with Earth positioned directly in the center. As Earth blocks incoming sunlight, the moon enters the penumbra and umbra, the primary shadows cast by our planet, causing the distinct red appearance. This is not a total eclipse, meaning the moon will not reflect the full illumination associated with a standard full moon phase.

The partial lunar eclipse occurs on October 5, 2026.
The eclipse begins at 9:38 pm Central time.
The event reaches its peak illumination at 11:12 pm.
The next eclipse in the Saros 138 series will occur in 2044.

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The Tech Race

Astronomers use the Saros cycle to map long-term lunar and solar alignments across centuries. This event follows the established timeline for the Saros 138 series, maintaining the trajectory of periodic orbital observations.

Residents across the eastern United States will be able to observe the eclipse starting at 9:38 pm Central time. No special equipment is required to view the red-tinted moon, provided the local skies remain clear during the peak at 11:12 pm.

The takeaway

The October 5, 2026, eclipse provides a clear marker for tracking the Saros 138 cycle. Observers interested in the mechanics of lunar shadows should mark their calendars for the 11:12 pm peak.