4LL9
Alan B. Janssen Airport
Alan B. Janssen Airport (4LL9) is a general-aviation airfield serving Morrisonville, Illinois. The field lies at 642 ft (196 m) above sea level and has a single runway of 1,980 ft (604 m), grass. Its nearest neighbour is Horsefeathers Ranch Airport (1IL1), 6 nm S.
Alan B. Janssen Airport is a smaller field, so Alārium does not attribute movements to it directly — but aircraft flying near it appear on the live map like any other, at their real altitude and on their real track.
Location
- Elevation
- 642 ft (196 m)
- Coordinates
- 39.3437, -89.4237
- Serving
- Morrisonville
- Region
- Illinois
- Time zone
- America/Chicago
Runways1 · longest 1,980 ft
| Runway | Length | Width | Surface | Lighting |
|---|---|---|---|---|
| E/W | 1,980 ft604 m | 75 ft | Grass | — |
Nearby airfields
Runway and field data from the OurAirports public-domain dataset. Positions are ADS-B, which covers most but not all aircraft.