Orion is a constellation, not a planet or star. It does not have its own year length.

To understand the concept of a "year" for a celestial body, we need to consider its orbit around another object. For example:

* Earth's year: This is defined as the time it takes Earth to complete one orbit around the Sun.

* Mars's year: This is defined as the time it takes Mars to complete one orbit around the Sun.

Since Orion is a constellation and does not orbit anything, it does not have a year length.