At first I thought it was some sort of fireworks because the head (which was teardrop shaped) had occasional flashes of different colors (red, yellow) in a mostly white.
Location
Address
Mountlake Terrace, WA
Latitude
47° 47' 36'' N (47.793332°)
Longitude
122° 18' 21.05'' W (-122.305847°)
Elevation
148.793m
Time and Duration
Local Date & Time
2017-07-29 21:59 PDT
UT Date & Time
2017-07-30 04:59 UT
Duration
≈7.5s
Direction
Moving direction
From up right to down left
Descent Angle
265°
Moving
Facing azimuth
90°
First azimuth
140°
First elevation
53°
Last azimuth
30°
Last elevation
40°
Brightness and color
Stellar Magnitude
-15
Color
Blue, Yellow, Red, White
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
Yes
Duration
6s
Length
8°
Remarks
The train was like a comet trail. There were some different colors in the trail.
Terminal flash
Observation
No
Remarks
-
Fragmentation
Observation
Yes
Remarks
At the end, it fragmented into at least two smaller fireballs at least one of which was red.
