August 2055 lunar eclipse
| Partial eclipse | |||||||||||||
The Moon's hourly motion shown right to left | |||||||||||||
| Date | August 7, 2055 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.4769 | ||||||||||||
| Magnitude | 0.9606 | ||||||||||||
| Saros cycle | 139 (22 of 79) | ||||||||||||
| Partiality | 203 minutes, 23 seconds | ||||||||||||
| Penumbral | 346 minutes, 20 seconds | ||||||||||||
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A partial lunar eclipse will occur at the Moon’s descending node of orbit on Saturday, August 7, 2055, with an umbral magnitude of 0.9606. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in the Earth's penumbra. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. Occurring about 4.4 days before apogee (on August 11, 2055, at 21:00 UTC), the Moon's apparent diameter will be smaller.
This lunar eclipse will be the last of an almost tetrad, with the others being on February 22, 2054 (total); August 18, 2054 (total); and February 11, 2055 (total).
The eclipse will last 3 hours, 23 minutes, and 23 seconds, and it will also be the last of the first set of partial eclipses in Lunar Saros 139.