I do not know how to measure the length of the tail but it was about 20 - 30 times the size of the object in length
Location
Address
Las Vegas, NV
Latitude
36° 14' 17.37'' N (36.238159°)
Longitude
115° 12' 27.06'' W (-115.207516°)
Elevation
672.834m
Time and Duration
Local Date & Time
2017-09-17 19:15 PDT
UT Date & Time
2017-09-18 02:15 UT
Duration
>60s
Direction
Moving direction
From up left to down right
Descent Angle
175°
Moving
Facing azimuth
271.45°
First azimuth
273.51°
First elevation
63°
Last azimuth
273.15°
Last elevation
19°
Brightness and color
Stellar Magnitude
-16
Color
Orange, Yellow, Light Yellow, White
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
Yes
Duration
60s
Length
-
Remarks
appeared to have two lines of whitish trail that stayed consistent throughout the time I watched it, the actual object was flashing between whitish yellow to orange
