My fiancé saw the event as well. We were driving west on 70 in Colorado. It was extremely bright and began as a huge ball and trailed downward for about 1.5-2 seconds.
Location
Address
Glenwood Springs, CO
Latitude
39° 32' 23.76'' N (39.54°)
Longitude
107° 37' 15.67'' W (-107.62°)
Elevation
1667.27m
Time and Duration
Local Date & Time
2021-12-06 00:01 MST
UT Date & Time
2021-12-06 07:01 UT
Duration
≈1.5s
Direction
Moving direction
From up left to down right
Descent Angle
171°
Moving
Facing azimuth
241.8°
First azimuth
232.02°
First elevation
59°
Last azimuth
238.59°
Last elevation
29°
Brightness and color
Stellar Magnitude
-19
Color
Blue, Light Blue
Concurrent Sound
Observation
Unknown
Remarks
-
Delayed Sound
Observation
Unknown
Remarks
-
Persistent train
Observation
Unknown
Duration
-
Length
-
Remarks
-
Terminal flash
Observation
Yes
Remarks
Kind of spark like a firework makes at first then trailed downward to the earth.