| Observer | |
|---|---|
| Name | Curt M |
| Experience Level | 3/5 |
| Remarks | We were out looking for northern lights. Seeing frequent shooting stars. Suddenly, the entire area was lit as though someone had turned their headlights on. We were highly startled 😱 Just as our excitement quieted, we heard a clear, bassful thud. We didn't see what we went out to see, but saw something much more memorable. |
| Location | |
|---|---|
| Address | Marengo, IA |
| Latitude | 41° 50' 11.4'' N (41.836501°) |
| Longitude | 92° 3' 29.57'' W (-92.058215°) |
| Elevation | 276.570374m |
| Time and Duration | |
|---|---|
| Local Date & Time | 2021-10-30 20:26 CDT |
| UT Date & Time | 2021-10-31 01:26 UT |
| Duration | ≈3.5s |
| Direction | |
|---|---|
| Moving direction | From up right to down left |
| Descent Angle | 269° |
| Moving | |
|---|---|
| Facing azimuth | 280.46° |
| First azimuth | 318.27° |
| First elevation | 89° |
| Last azimuth | 249.64° |
| Last elevation | 89° |
| Brightness and color | |
|---|---|
| Stellar Magnitude | -24 |
| Color | Orange, Yellow |
| Concurrent Sound | |
|---|---|
| Observation | No |
| Remarks | - |
| Delayed Sound | |
|---|---|
| Observation | Yes |
| Remarks | Approx 20s after, 3 of us stargazers heard a large, "boom" |
| Persistent train | |
|---|---|
| Observation | Yes |
| Duration | 5s |
| Length | 70° |
| Remarks | Glowed yellow, then gradually faded |
| Terminal flash | |
|---|---|
| Observation | Unknown |
| Remarks | - |
| Fragmentation | |
|---|---|
| Observation | Unknown |
| Remarks | - |