Reports Report 638cv (Event 638-2015)

Name Katie B
Experience Level 3/5
Remarks At first I thought it was a UFO. And then I was surprised by how quickly it seemed to be moving. I ultimately decided that it was a light on the front of a helicopter. I just couldn't imagine where it was going to land.
Address Boulder, CO
Latitude 39° 58' 33.34'' N (39.975927°)
Longitude 105° 12' 51.88'' W (-105.214412°)
Elevation 1647.639526m
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 up right to down left
Descent Angle 265°
Facing azimuth 305°
First azimuth 340°
First elevation 53°
Last azimuth 280°
Last elevation 45°
Brightness and color
Stellar Magnitude -22
Color Light Yellow
Concurrent Sound
Observation No
Remarks -
Delayed Sound
Observation No
Remarks -
Persistent train
Observation Unknown
Duration -
Length -
Remarks -
Terminal flash
Observation No
Remarks -
Observation No
Remarks -