Planet naming system.

Naming For Terrestrial planets. Planets are named after the type of planet they are, the category, and it's ranking. Planets are ranked from first discovered to last, starting at 1. For example, the first ice dessert planet found would be D2-1. Planets if they show many different biomes can have a longer prefix in their names, the earth would be D12S1L1234-1 for example, but Earth-like planets have their own categorization.
The Types of terrestrial Planet.
Dessert (hot)- D1
Desert (cold)-D2
Desert (neutral)- D3
Ocean (salt) S1
Ocean (Freshwater)- S2
Volcanic-V
Leafy (Temprate)-L1
Leafy (Chilled)-L2
Leafy (Tropical)-L3
Leafy (Dry)-L4
Earth-like (category 1)-E1
Earth-like (Category 2)- E2... and so on
Rocky (sedimentary)- R1
Rocky (metamorphic)- R2
Rocky (volcanic)- R3
Naming for gas planets They are named much more simply, the letter G, the gasses in their atmosphere (periodic table letters) and their ranking (ranking is the same). A planet primarily based off hydrogen, nitrogen, and helium would be G-H,He,N-12
Other naming systems Asteroid and comet names are started with a simple A at the start, and only have a few types, Rocky (R) Leafy (L), Cold (C) Volcanic (V) and Ocean (O). So a rocky and leafy asteroid would be named A-RL-12 or something similar.
Names of moons are started with the planet they orbit, the letter M, their ranking (how close they are to the planet), and their type. For example, Our own moon would be E1-M-R1-1.