Lunar eclipse: Penumbral — 17 August 2027
Global eclipse conditions
A penumbral lunar eclipse occurs when the Moon passes through Earth’s lighter outer shadow without entering the umbra. It begins at 20:26 (GMT-9), reaches maximum at 22:16, when about 54% of the lunar disk is within the penumbra, and ends at 00:03. This subtle dimming can be difficult to notice.Eclipse phase times at your location
| Phase | Time (GMT-9) | Local visibility |
|---|---|---|
| Penumbral eclipse begins | 20:26 | 👁 |
| Maximum occurs at 22:16. The eclipse is penumbral, with 54% penumbral coverage. | ||
| Penumbral eclipse ends | 00:03 | 👁 |
Global visibility map
Local eclipse conditions at (GMT-9)
Relative positions of Earth’s shadow and the Moon
Local eclipse parameters
| Phase | |
| Penumbral magnitude | |
| Umbral magnitude | |
| Penumbral coverage | |
| Umbral coverage | |
| Umbra diameter, km | |
| Penumbra diameter, km | |
| Distance from the shadow axis, km |
Observation parameters
| Time | |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Moon elevation | |
| Moon azimuth |