There was a lot of light pollution where I was, so the fact that I distinctly saw what I saw means that it would have appeared much brighter in a darker area.
Location
Address
Jackson, WY
Latitude
43° 28' 45.71'' N (43.479365°)
Longitude
110° 45' 44.72'' W (-110.762421°)
Elevation
1903.221191m
Time and Duration
Local Date & Time
2019-09-12 22:02 MDT
UT Date & Time
2019-09-13 04:02 UT
Duration
≈1.5s
Direction
Moving direction
From up right to down left
Descent Angle
269°
Moving
Facing azimuth
5°
First azimuth
9°
First elevation
28°
Last azimuth
355°
Last elevation
28°
Brightness and color
Stellar Magnitude
-12
Color
White
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
Yes
Duration
2s
Length
10°
Remarks
There was much light pollution where I was, but I definitely saw a glowing white train that faded after a second or two.