Umbra
The darkest central shadow. Entering it produces totality.
Partial Lunar Eclipse of August 28, 2026
Greatest eclipse 04:13 UTC. Check the local times for your own place below.
Local circumstances
Will you see it, and when?
Choose a place to see local times.
Pick a place above and this panel will show whether the eclipse is visible from there, and the local clock time of every phase.
Whole eclipse above the horizonMoon rises or sets during it
The phases of a lunar eclipse happen at the same instant everywhere on Earth. Those instants come from NASA's catalog (greatest eclipse in Terrestrial Time plus the published durations), converted to UTC with the published 75 s value of Delta-T. Only the Moon's position in your sky is computed here. Source: Five Millennium Catalog. Eclipse Predictions by Fred Espenak, NASA's GSFC. Full method and limits in our methodology.
Partial Lunar Eclipse of August 28, 2026
--
The second eclipse of the same season, sixteen days after the August 12 solar eclipse. NASA's catalog puts the umbral magnitude at 0.93, so almost the whole Moon enters the dark shadow without quite reaching totality.
Interactive orbit lab
See how Earth's umbra clips the Moon
Move time through this partial event, then hover, focus, or tap any labeled object. The light direction and shadow order are physical; sizes and distances are compressed for clarity.
Sun → Earth → MoonPenumbral phaseThe Moon is inside Earth's lighter outer shadow.
Moon
At full moon, the Moon can pass through Earth's shadow. Air around Earth filters and bends red light into the umbra.
Hover, focus, or tap a body or shadow to inspect it.Partial lunar eclipseThe closest approach is constrained to this cataloged event type.
Penumbra
Earth's lighter outer shadow surrounds the umbra and gently dims the Moon first.
Why not every month?
The Moon's orbit is tilted about 5.1°. An eclipse needs new or full moon near a node, where the two orbital planes cross.
Only part of the Moon enters Earth's umbra. A dark curved bite appears, but the whole lunar disc never turns red in totality.
Key facts
| Type | Partial lunar eclipse |
|---|---|
| Date | August 28, 2026 |
| Greatest eclipse | 04:13 UTC (the panel above shows your own local times) |
| Visible from | the eastern Pacific, the Americas, Europe, and Africa |
| Saros series | 138 |
| Gamma | 0.4964(how far the shadow axis passes from Earth's centre, in Earth radii) |
| Umbral magnitude | 0.9299 of the Moon's diameter inside the dark shadow |
What you will see
Part of the full Moon slides into Earth's umbral shadow, so a dark bite grows and then recedes across the lunar disc. Visible wherever the Moon is up across the eastern Pacific, the Americas, Europe, and Africa. Safe to watch with the naked eye.
To follow the day and night line on the date of the eclipse, open the live globeand use its time scrubber: the eclipse happens along the Moon's shadow track through the daytime side (for a lunar eclipse, the night side watches the Moon).
Catalog data from NASA GSFC (Five Millennium Catalog of LunarEclipses), Terrestrial Time converted to UTC with the Delta-T value published for this eclipse. Eclipse Predictions by Fred Espenak, NASA's GSFC. Lunar phases happen at the same instant worldwide; only the Moon's position in your sky is computed. How we compute this.