Reports Report 638bk (Event 638-2015)

Name Reed T
Experience Level 4/5
Remarks I was driving in a car at the time of observation; observation was degraded by automobile lights, nearby highway illumination signs, windshield reflections. At first I thought it was a close, fast-moving helicopter, but continued observation left me questioning that. I *thought* I saw some slight sputtering/tail debris, but cannot be positive. It seemed to be moving far too quickly to be an aircraft given the apparent distance it would have had to travelled and me not be able to make out anything other than the white light I saw. I specifically looked for blinking red aircraft lights and saw none. I was able to watch it as it faded and dimmed completely and it appeared more like a dimming fireball instead of an aircraft light pointing away (adding evidence that it was not an aircraft), however given the poor observing conditions I cannot assure that it was not an aircraft. Adding to the unusual nature was that it *appeared* to be moving directly E-W at constant altitude. The trajectory looked like that of an aircraft, but the speed and other factors make it unlike any other nighttime aircraft observation I have ever seen. From my evidence, I am judging probability 50% fireball, 50% misidentified aircraft/other.
Address Westminster, CO
Latitude 39° 52' 57.15'' N (39.882542°)
Longitude 104° 59' 14.57'' W (-104.98738°)
Elevation 1640.195068m
Time and Duration
Local Date & Time 2015-03-11 05:58 MDT
UT Date & Time 2015-03-11 11:58 UT
Duration ≈20s
Moving direction From right to left
Descent Angle 270°
Facing azimuth -
First azimuth 20°
First elevation 20°
Last azimuth 288.86°
Last elevation 15°
Brightness and color
Stellar Magnitude -7
Color White
Concurrent Sound
Observation Unknown
Remarks -
Delayed Sound
Observation Unknown
Remarks -
Persistent train
Observation No
Duration -
Length -
Remarks -
Terminal flash
Observation No
Remarks -
Observation No
Remarks -