the sighting was brief but very large compared to most I have seen, also the splitting off of some of it was something I have never witnessed, like a rocket when it jettisons its boosters.
Location
Address
Helena, MT
Latitude
46° 44' 26.79'' N (46.740775°)
Longitude
112° 10' 31.22'' W (-112.175339°)
Elevation
1310.444092m
Time and Duration
Local Date & Time
2019-11-30 17:30 MST
UT Date & Time
2019-12-01 00:30 UT
Duration
≈1.5s
Direction
Moving direction
From up right to down left
Descent Angle
250°
Moving
Facing azimuth
182.88°
First azimuth
166.55°
First elevation
60°
Last azimuth
136.8°
Last elevation
51°
Brightness and color
Stellar Magnitude
-17
Color
Light Yellow
Concurrent Sound
Observation
Unknown
Remarks
-
Delayed Sound
Observation
Unknown
Remarks
-
Persistent train
Observation
Unknown
Duration
-
Length
-
Remarks
-
Terminal flash
Observation
Unknown
Remarks
-
Fragmentation
Observation
Yes
Remarks
a notable piece separated and split off arching down and looked as if it burned up
