| Type: | penumbral |
| Date: | 27 July 1980 |
| Axis: | 1.1060° |
| Gamma: | 1.41391 |
| Magnitude: | 0.25354 |
| Saros Ser: | 109 |
| Saros No: | 71 of 73 |
| Penumbral: | 137 minutes, 36.3 seconds |
| P1: | 17:59:26.4 |
| Greatest: | 19:08:07.2 |
| P4: | 20:17:02.7 |
| Previous: | March 1980 |
| Next: | August 1980 |
A penumbral lunar eclipse took place on Sunday, July 27, 1980, the second of three penumbral lunar eclipses in 1980. This very subtle penumbral eclipse was essentially invisible to the naked eye; though it lasted 2 hours, 17 minutes and 36.3 seconds, just 25.354% of the Moon's disc was in partial shadow (with no part of it in complete shadow). The moon passed in the northern edge of the Earth's penumbral shadow, and was the 70th lunar eclipse of Saros cycle 109.[1]
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[2] This lunar eclipse is related to one partial solar eclipse of Solar Saros 116.
This lunar eclipse is the third to last member of Saros series 109. The next event is on August 8, 1998. The previous event was on July 17, 1962.