At first I thought it was a 'sky rocket' type of firework, but it was too high in the sky and too 'strong' and seemed to persist too far across the sky.
Location
Address
Oceanside, CA
Latitude
33° 11' 12.8'' N (33.186888°)
Longitude
117° 18' 23.67'' W (-117.306575°)
Elevation
90.633m
Time and Duration
Local Date & Time
2015-12-14 20:35 PST
UT Date & Time
2015-12-15 04:35 UT
Duration
≈3.5s
Direction
Moving direction
From down right to up left
Descent Angle
299°
Moving
Facing azimuth
26°
First azimuth
28°
First elevation
75°
Last azimuth
245.14°
Last elevation
75°
Brightness and color
Stellar Magnitude
-9
Color
Orange, Yellow
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
Yes
Duration
3s
Length
70°
Remarks
A glowing train, bright at the head tapering down but still very strong to the end.