The sky wasn't fully dark so the light was actually bright enough (though momentary) to catch our attention; and that's how we ended up observing the smoke trail that was there after the light extinguished.
Location
Address
Sunnyvale, CA
Latitude
37° 22' 13.08'' N (37.370301°)
Longitude
122° 0' 23.26'' W (-122.00646°)
Elevation
21.559038m
Time and Duration
Local Date & Time
2021-02-10 18:15 PST
UT Date & Time
2021-02-11 02:15 UT
Duration
<1s
Direction
Moving direction
From up left to down right
Descent Angle
153°
Moving
Facing azimuth
277°
First azimuth
275°
First elevation
36°
Last azimuth
283°
Last elevation
34°
Brightness and color
Stellar Magnitude
-23
Color
Bright white to light yellow
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
Yes
Duration
99.99s
Length
14°
Remarks
The moving bright light ceased in a second or less leaving a whitish smoke trail as if something was falling but just hung there. There was a slight loop /curve visible into the first minute or so. There was some nonuniform puffiness in the trail. The trail stayed on for well over 3-4 minutes
Terminal flash
Observation
Yes
Remarks
The flash of bright light was what caught our attention (like a momentary bright light falling). The smoke trail was what we saw when the momentary light extinguished.
