I asked another group walking a dog if they saw it. They said yes but thought it was a firework. It was not a firework. It was to high and fast. It seemed to head NE and burned out over the lake. I am not totally sure on the time but probably between 11:30 P.M Central and Midnight.
Location
Address
Winnetka, IL
Latitude
42° 6' 1.44'' N (42.1004°)
Longitude
87° 43' 29.57'' W (-87.72488°)
Elevation
187.895m
Time and Duration
Local Date & Time
2017-12-18 23:50 CST
UT Date & Time
2017-12-19 05:50 UT
Duration
≈3.5s
Direction
Moving direction
From down left to up right
Descent Angle
22°
Moving
Facing azimuth
1.97°
First azimuth
13.88°
First elevation
45°
Last azimuth
359.21°
Last elevation
45°
Brightness and color
Stellar Magnitude
-22
Color
Green
Concurrent Sound
Observation
Unknown
Remarks
-
Delayed Sound
Observation
Unknown
Remarks
-
Persistent train
Observation
Unknown
Duration
-
Length
-
Remarks
-
Terminal flash
Observation
Yes
Remarks
I saw it streaking across the sky and it turned bright green and then went out
