I was inside, and did hear some rumblings later, but it may have been equipment on the railroad tracks.
Location
Address
Fraser, CO
Latitude
39° 56' 50.6'' N (39.947388°)
Longitude
105° 49' 6.87'' W (-105.818574°)
Elevation
-
Time and Duration
Local Date & Time
2012-06-20 12:38 MDT
UT Date & Time
2012-06-20 18:38 UT
Duration
≈3.5s
Direction
Moving direction
From up to down
Descent Angle
180°
Moving
Facing azimuth
99.74929°
First azimuth
95.34098°
First elevation
35°
Last azimuth
91.03982°
Last elevation
-
Brightness and color
Stellar Magnitude
-27
Color
white to blue
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
No
Duration
-1s
Length
-1°
Remarks
Definitely a train, but probably just a burn on to my retina. No smoke trail. Odd for the middle of the day. Never have seen anything like it. More like a pulsar, electric appearance.