through Earth's umbra, completely. The gamma is the limit of: If is 0, the Moon's center passes exactly through the axis of the Earth's umbra. If is lower than 0.2725, this lunar eclipse is central. If is between 0.2725 and 0.47, this lunar eclipse is total. If is between 0.43 and 1.026, this lunar eclipse is partial. If is between 0.9684 and 1.026, this lunar eclipse is total penumbral. If is between 1.026 and approximately 1.55, this lunar eclipse is penumbral, and the Moon traverses only the Earth's penumbra. If exceeds approximately 1.55, the Earth's penumbra misses the Moon completely, and no eclipse occurs. References Solar eclipses Lunar eclipses