Reports Report 857e (Event 857-2011)
| Observer | |
|---|---|
| Name | Adam |
| Experience Level | 2/5 |
| Remarks | Many diners and staff witnessed the fireball. Just amazing to be that close. The fragments certainly fell to the northeast on the forest below the deck or in the neighborhood below to the NE. |
| Location | |
|---|---|
| Address | boulder, CO |
| Latitude | 40° 0' 26'' N (40.007221°) |
| Longitude | 105° 17' 39.44'' W (-105.294288°) |
| Elevation | - |
| Time and Duration | |
|---|---|
| Local Date & Time | 2011-08-18 21:00 MDT |
| UT Date & Time | 2011-08-19 03:00 UT |
| Duration | ≈7.5s |
| Direction | |
|---|---|
| Moving direction | From up to down |
| Descent Angle | 180° |
| Moving | |
|---|---|
| Facing azimuth | 50.63055° |
| First azimuth | 47.3859° |
| First elevation | 90° |
| Last azimuth | 46.78469° |
| Last elevation | 45° |
| Brightness and color | |
|---|---|
| Stellar Magnitude | 1 |
| Color | Yellow-white ball, greeni |
| Concurrent Sound | |
|---|---|
| Observation | No |
| Remarks | - |
| Delayed Sound | |
|---|---|
| Observation | No |
| Remarks | I did not hear anything as it flew overhead, though there may have been some crackling sounds at breakup. |
| Persistent train | |
|---|---|
| Observation | Yes |
| Duration | 5s |
| Length | 30° |
| Remarks | the fireball passed directly overhead of the restaurant deck, bright with geenish blue tail and smoke. This fireball was only 100 to 200 ft max above the restaurant deck. It descended, broke into bright fragments, which burned bright then went dark. |
| Terminal flash | |
|---|---|
| Observation | Unknown |
| Remarks | There may have been a bright flash before fragmentation. The fragments burned bright, and due to the proximity were easily visible as they split off from the main ball. They burned for about 2 seconds before going dark. |
| Fragmentation | |
|---|---|
| Observation | Yes |
| Remarks | - |