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Observer Name foo B Experience Level 5/5 Remarks I study bolides
Location Address Foster City, CA Latitude 37° 33' 38.33'' N (37.56°) Longitude 122° 15' 40.58'' W (-122.26°) Elevation 1.69m
Time and Duration Local Date & Time 2018-12-19 17:35 PST UT Date & Time 2018-12-20 01:35 UT Duration ≈3.5s
Direction Moving direction From down left to up right Descent Angle 23°
Moving Facing azimuth 280° First azimuth 300° First elevation 30° Last azimuth 290° Last elevation 25°
Brightness and color Stellar Magnitude -17 Color White
Concurrent Sound Observation No Remarks -
Delayed Sound Observation No Remarks -
Persistent train Observation Yes Duration 99.99s Length 10° Remarks dust trail illuminated by the sun which had just fallen below the local horizon, the dust trail persisted till we lost the light about 15 mins after the fireball
Terminal flash Observation Yes Remarks bright,
Fragmentation Observation Yes Remarks 1 flare and then a terminal flash.