June 1991 lunar eclipse
| Penumbral eclipse | |||||||||
The Moon's hourly motion shown right to left | |||||||||
| Date | June 27, 1991 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | −1.4064 | ||||||||
| Magnitude | −0.7571 | ||||||||
| Saros cycle | 110 (70 of 72) | ||||||||
| Penumbral | 169 minutes, 32 seconds | ||||||||
| |||||||||
A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Thursday, June 27, 1991, with an umbral magnitude of −0.7571. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into 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 only about 5 hours before apogee (on June 27, 1991, at 8:20 UTC), the Moon's apparent diameter was smaller.
This eclipse was the second of four lunar eclipses in 1991, with the others occurring on January 30 (penumbral), July 26 (penumbral), and December 21 (partial).