Impar

Impar (or Promi IID) was a uninhabited (disregarding scientist and sparse animal life) class-L planet under Federation scientific jurisdiction due to it's uniquely developed life.

Impar was discovered in the early 24th century was disregarded until the 2420s when a Federation survey vessel discovered the life on the northern continent.

Planetary data
Impar was a fast rotating and orbiting planet, it was very little ellipsoid shaped and still retained a spheroid-like shape. It's rotation being 19 hours long and orbit 306 days long. Impar retained a mean mass of 5.62×1024kilograms, and a density of 5.65 g/cm3.

Unlike other class-L planets with oxygen/argon atmospheres. Impars atmosphere was 80.3% nitrogen, 15.8% oxygen, 2.6% argon, and traces of carbon dioxide, argon, and 2 other gases.

It's atmosphere also was typically moist.