*Astronomical Units to Kilometers*
1 AU = 149 598 000 km
2 AU = 299 196 000 km
3 AU = 448 794 000 km
4 AU = 598 392 000 km
5 AU = 747 990 000 km
6 AU = 897 588 000 km
7 AU = 1 047 186 000 km
8 AU = 1 196 784 000 km
9 AU = 1 346 382 000 km
10 AU = 1 495 980 000 km
11 AU = 1 645 578 000 km
12 AU = 1 795 176 000 km
13 AU = 1 944 774 000 km
14 AU = 2 094 372 000 km
48 AU = 7 152 000 000 km

Max Scanner Range
14.413 AU = 2 147 483 647 km
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Anomalies are ranked in difficulty by 10 levels, these are:
Burrow / Drone Collection (easiest)
Hideaway / Drone Cluster
Refuge / Drone Assembly
Den / Drone Gathering
Yard / Drone Surveillance
Rally Point / Drone Menagerie
Port / Drone Herd
Hub / Drone Squad
Haven / Drone Portal
Sanctum / Drone Horde (hardest)

An anomaly may be further sub-divided into 3 more categories:
Hidden [easiest]
Forsaken [normal]
Forelorn [hardest]