The object disappeared behind the hill and It was about the size of my thumb held in front of my case at arms reach. (I'm 6'-0" tall) seen it for less than a secouand a half.
Location
Address
San Carlos, CA
Latitude
37° 30' 7.52'' N (37.50209°)
Longitude
122° 16' 1.7'' W (-122.26714°)
Elevation
24.727m
Time and Duration
Local Date & Time
2018-06-18 21:10 PDT
UT Date & Time
2018-06-19 04:10 UT
Duration
≈1.5s
Direction
Moving direction
From up left to down right
Descent Angle
115°
Moving
Facing azimuth
244.64°
First azimuth
246.96°
First elevation
35°
Last azimuth
245.63°
Last elevation
15°
Brightness and color
Stellar Magnitude
-13
Color
Blue-green
Concurrent Sound
Observation
Unknown
Remarks
I was on a motorcycle wearing a helmet and couldn't have heard anything