A penumbral lunar eclipse took place on Tuesday, September 27, 1977, the second of two lunar eclipses in 1977. At maximum eclipse, 90.076% of the Moon's disc was partially shaded by the Earth, which caused a slight shadow gradient across its disc; this subtle effect may have been visible to careful observers. No part of the Moon was in complete shadow. The eclipse lasted 4 hours, 17 minutes and 35.5 seconds overall. Occurring 6.2 days before apogee (Apogee on October 3, 1977), the Moon's apparent diameter was 2.2% smaller than average.^[1]

It was completely visible over east in Asia, Australia, Pacific, North America and South America, seen rising over Asia, East China Sea and Australia and setting over the Atlantic and South America.

• List of lunar eclipses
• List of 20th-century lunar eclipses