The event was bright enough that I noticed an increase in the ambient light on a lightly lit main road. It was the initial flash which drew my attention. Also I didn't get to see where it ultimately disappeared behind the horizon due to a building (Baker's Pharmacy) being in the way. I didn't know to wait up to five minutes for a sound so I went inside about a minute to two minutes after having initially seen it.
Location
Address
Shelburne Falls, MA
Latitude
42° 36' 12.74'' N (42.603538°)
Longitude
72° 44' 19.56'' W (-72.738768°)
Elevation
126.828m
Time and Duration
Local Date & Time
2016-05-17 01:04 EDT
UT Date & Time
2016-05-17 05:04 UT
Duration
≈20s
Direction
Moving direction
From up right to down left
Descent Angle
204°
Moving
Facing azimuth
18.93°
First azimuth
21.95°
First elevation
60°
Last azimuth
3.66°
Last elevation
-
Brightness and color
Stellar Magnitude
-21
Color
Light Blue, Green
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
-
Persistent train
Observation
Yes
Duration
2s
Length
15°
Remarks
Glowing train, not quite as bright as the object. Disappeared relatively quickly.