ObsCode grid
This overview shows every possible MPC observatory code slot from 000 to Z99. Colored squares are station codes that already exist in the current MPC data; blinking grey squares are still unassigned. Click an existing square to open the corresponding station page.
Total slots: 3.600
Assigned: 2.706
Unassigned: 894
Legend
Color aging
- fresh green: last observation close to the newest date in the data
- yellow green: roughly one year older than the newest date
- orange: roughly five years older than the newest date
- red: ten years or more older than the newest date
- blue grey: no usable last-observation date
Fill intensity and empty slots
- light: few observations
- medium: medium observation count
- dark: high observation count
- blinking grey: code is not assigned in the current MPC data
Continent color legend
- Europe: 1.402 assigned codes
- North America: 652 assigned codes
- Asia: 279 assigned codes
- South America: 152 assigned codes
- Oceania: 139 assigned codes
- Africa: 51 assigned codes
- Space: 25 assigned codes
- Rover: 4 assigned codes
- Antarctica: 2 assigned codes