This event appeared to me as either a UFO, a military launch / test. It appeared to move too slow for a comet or asteroid in my opinion.
Location
Address
Castro Valley, CA
Latitude
37° 42' 21.37'' N (37.705935°)
Longitude
122° 4' 53.97'' W (-122.081658°)
Elevation
70.786896m
Time and Duration
Local Date & Time
2016-07-27 21:39 PDT
UT Date & Time
2016-07-28 04:39 UT
Duration
≈20s
Direction
Moving direction
From right to left
Descent Angle
270°
Moving
Facing azimuth
135°
First azimuth
-
First elevation
45°
Last azimuth
90°
Last elevation
45°
Brightness and color
Stellar Magnitude
-13
Color
mainily white
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
No
Duration
-
Length
-
Remarks
-
Terminal flash
Observation
No
Remarks
-
Fragmentation
Observation
Yes
Remarks
The fire ball looked like a rocket with a trail behind it moving steadily across the sky but nowhere as fast as a comet/ shooting star. It had a trail of light/gas behind it. It appeared to have pieces falling behind it as it was going out of my sight towards the East over San Ramon, CA
