ASTROMETRICS OPTIMIZED SIGNAL CLASSIFICATIONS
The following spectrum is the most current version in use with contemporary Starfleet astrometrics suites.
| Class | Name | Desc | |
|---|---|---|---|
| Y | Demon |  Nukara Prime |
Exotic radiation, thermionic activity, toxic compounds. Often can damage equipment. |
| G | Geoplastic |  Excalbia |
High volcanic activity, early molten crust. Young and geologically violent. |
| N | Reducing |  Venus, Sol System |
Toxic or crushing atmosphere. Runaway greenhouse effect. |
| H | Arid/Harsh |  Vulcan |
Less than 20% surface water. Extreme temperatures, radiation, or weather. |
| D | Planetoid |  Earth, Sol's moon, Luna |
Rocky, dwarf-sized body. Airless, low gravity. |
| A | Alloy |  Iconian Gateway |
Metallic compounds/mixtures. |
| C | Organic |  Cnidarian Cosmozoan |
Carbon-chain and/or biogenic mass. |
| K | Adaptable |  Mars, Sol System |
Terrestrial with minimal or no breathable atmosphere. |
| L | Marginal |  |
Almost M-like. Some vegetation, no fauna. Borderline habitable. |
| M | Terrestrial |  Earth, Sol System |
Minshara (Earthlike). Full biosphere, nitrogen-oxygen atmosphere, liquid water. |
| O | Pelagic |  |
Ocean world. Surface water exceeds 80%. Minimal or no landmass. |
| P | Ice Giant |  Andoria |
Ice world. Frozen surface exceeds 80%. |
| J | Gas Giant |  Jupiter, Sol System |
Hydrogen-helium envelope. No solid surface. Jovian scale. |
| T | Substellar |  ((art credit)) |
Substellar mass |
| S | Stellar |  Sol |
Thermonuclear stellar mass or stellar remnant |
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You can access the Astrometrics spreadsheet via this link: astrometrics db. Use this whenever you want to add a new system that can be viewed via the Astrometrics System Scanner!
This spectrum was crafted by kludging together the following references, with some deference to real life astronomy and assumed RP use cases:
- Memory Alpha Planetary classification
- Starbase 118’s Planetary Classification, which pulled all their info from Star Trek: Star Charts.
All planetary art was screenshotted directly from Star Trek: Online except where specifically attributed elsewhere.