Km conversions to AU in scanner range:

149,597,870.7Km = 1AU
299,195,741.4Km = 2AU
448,793,612.1Km = 3AU
598,391,482.8Km = 4AU
747,989,353.5Km = 5AU
897,587,224.1Km = 6AU
1,047,185,095Km = 7AU
1,196,782,966Km = 8AU
1,346,380,836Km = 9AU
1,495,978,707Km = 10AU
1,645,576,578Km = 11AU
1,795,174,448Km = 12AU
1,944,772,319Km = 13AU
2,094,370,190Km = 14AU
2,147,483,647Km = 14.355AU

Site difficulty rating from easiest to hardest.
1. (Faction) Burrow / Drone Collection (easiest)
2. (Faction) Hideaway / Drone Cluster
3. (Faction) Refuge / Drone Assembly
4. (Faction) Den / Drone Gathering
5. (Faction) Yard / Drone Surveillance
6. (Faction) Rally Point / Drone Menagerie
7. (Faction) Port / Drone Herd
8. (Faction) Hub / Drone Squad
9. (Faction) Haven / Drone Patrol
10. (Faction) Sanctum / Drone Horde (hardest)