What type of lunar eclipse is the least common in north america?

Answer 1

Total lunar eclipses are slightly less common than other varieties. From the NASA Eclipse Web Site:

Lunar Eclipses: -1999 to +3000

Type Symbol Number Percent

All Eclipses - 12064 100.0%

Penumbral N 4378 36.3%

Partial P 4207 34.9%

Total T 3479 28.8%

Answer 2

The least common type of lunar eclipse in North America is a central total lunar eclipse, where the Moon passes through the central part of Earth's shadow, resulting in a longer total eclipse phase. These types of lunar eclipses are less frequent because of the precise alignment needed for the Moon to pass through the center of Earth's shadow.