Reports Report 3209a (Event 3209-2017)

Observer
Name Flavia H
Experience Level 2/5
Remarks As I was driving at about 55 mph at the time, I do not have an address to base my location -- just that I was approaching Exit 6, southbound I-270 in Rockville, MD. My husband, also driving on I-270S at the time but farther north from my location, also saw the event. He texted me immediately, and the text reports the time as 6:16, so it's possible that my car's clock was off and it actually happened at 6:15am.
Location
Address Rockville, MD
Latitude 39° 5' 25.76'' N (39.09049°)
Longitude 77° 10' 29.93'' W (-77.17498°)
Elevation 114.243m
Time and Duration
Local Date & Time 2017-09-15 06:16 EDT
UT Date & Time 2017-09-15 10:16 UT
Duration ≈3.5s
Direction
Moving direction From down right to up left
Descent Angle 350°
Moving
Facing azimuth 163°
First azimuth 150°
First elevation 65°
Last azimuth 170°
Last elevation 40°
Brightness and color
Stellar Magnitude -4
Color White
Concurrent Sound
Observation No
Remarks -
Delayed Sound
Observation Unknown
Remarks -
Persistent train
Observation No
Duration -
Length -
Remarks -
Terminal flash
Observation No
Remarks -
Fragmentation
Observation Unknown
Remarks -