Class J planet

In the Federation standard system of planetary classification, a class J planet was a gas giant.

In 2372, the USS Defiant (2370) entered the atmosphere of a class J planet to rescue the crew of a Karemma ship. The Karemma were attempting to escape from two Jem'Hadar ships. The atmosphere had windspeeds of over 10,000 kilometers per hour. This planet also had fluorine gas in its atmosphere. 

Klasse J Jクラス Klasse J planeet