| Name |
Object
Description |
Reference |
 |
| Class 1 |
Nebula |
VOY "Mortal Coil"
|
|
| Class 3 |
Nebula |
VOY "Disease"
|
|
Neutronic storm
* Historical |
ENT "The Catwalk"
|
|
| Class 4 |
Black hole |
ENT "Singularity"
|
|
Nebula |
TNG "Bloodlines"
|
|
| Class 5 |
Neutronic storm |
ENT "The Catwalk"
|
|
| Class 9 |
Gas giant
* Out of the four gas giants in Sol, none are Class 9 |
ENT "Sleeping Dogs"
|
|
Nebula |
VOY "Year of Hell, Part II"
|
|
Pressure wave |
VOY "Fair Haven"
|
|
| Class 11 |
Nebula |
VOY "Flashback"
|
|
| Class 17 |
Nebula |
VOY "Flashback"
|
|
| Class B |
Pulsar
* "Itinerant" |
VOY "Pathfinder"
|
|
| Class D |
Planet
* "A few unremarkable ores... a great rock in space" |
"Star Trek II: The Wrath of Khan"
|
|
Small, rocky planetoids |
ST Encyclopedia
|
|
Hot, arid, rocky |
VOY "Gravity"
|
|
"Uninhabitable" |
ENT "Cease Fire"
|
|
| Class H |
Planet
* oxygen/argon atmosphere |
VOY "Scorpion, Part II"
|
|
| Class J |
Gas giant |
DS9 "Starship Down"
|
|
| Class K |
Planet
* Adaptable for humanoid use with pressure domes |
TOS "I, Mudd"
|
|
| Class L |
Planet
* Oxygen/argon atmosphere |
VOY "The 37's"
|
|
Cold, "barely habitable" |
DS9 "The Ascent"
|
|
"Barely breathable athmosphere" of excess carbon dioxide |
DS9 "The Sound of Her Voice"
|
|
| Class M |
Planet
* Oxygen/nitrgen atmosphere |
TOS
|
|
| Class T |
Cluster
|
VOY "Good Shepherd"
|
|
Gas giant
|
VOY "Good Shepherd"
|
|
| Class Y |
Planet
* a.k.a. "Demon Class"
* Toxic atmosphere with thermeonic radiation
* Surface temperatures over 500K
|
VOY "Demon"
|
|
"Toxic atmosphere, sulphuric deserts, no trees, no life at all"
| VOY "Flesh and Blood"
|
|
| J'ral Class |
Supernova
* Remnant |
ENT "Civilization"
|
|
| K'Tall Class |
Gas giant
* Klingon designation for Class 9 |
ENT "Sleeping Dogs"
|
|
| K7 Class |
Star
* Yellow dwarf |
VOY:Mosaic
|
|
| Minshara Class |
Planet
* Vulcan designation for Class M |
ENT "Strange New World"
|
|
| Mutara Class |
Nebula
|
"Star Trek II: The Wrath of Khan"
|
|
| Theta Class |
Planet
|
VOY "Collective"
|
