Reports Report 4118m (Event 4118-2015)

This report has been linked to the following event: Event 4118-2015
Observer
NameRon D
Experience Level5/5
RemarksI am an astronomer by profession, and these details have error bars. I guarantee that the angle was within a degree of vertical (straight down) and the azimuth was estimated by distance to the left of the full moon, which I was observing at the time.
Location
AddressToronto, Ontario (CA)
Latitude43° 45' 45.5'' N (43.76°)
Longitude 79° 27' 41.9'' W (-79.46°)
Elevation185.68m
Time and Duration
Local Date & Time2015-12-24 18:38 EST
UT Date & Time2015-12-24 23:38 UT
Duration≈3.5s
Direction
Moving directionFrom up to down
Descent Angle180°
Moving
Facing azimuth78°
First azimuth78°
First elevation40°
Last azimuth78°
Last elevation10°
Brightness and color
Stellar Magnitude-16
ColorYellow with a green head, yellow trail
Concurrent Sound
ObservationNo
Remarks-
Delayed Sound
ObservationUnknown
RemarksI was in a car - no sounds detected
Persistent train
ObservationNo
Duration-
Length-
RemarksI could not see a train or smoke trail if there were one... it was only a few degrees from the full moon, and I was in a bright suburb of Toronto... and in a car. From the magnitude of the fireball I would expect that a train was visible but not by the moon or in a bright city.
Terminal flash
ObservationYes
RemarksSmooth ramp up in brightness at end to extreme brilliance with fragments trailing, but instead of an explosion it was a huge surge, then rapid extinction to invisible
Fragmentation
ObservationYes
RemarksMeteor fragmented about halfway through its flight, brightest fragment remained in the lead, and the magnitude was significant as it was. Probably 5+ spark-like yellow fragments that were constant in significant negative magnitude each, but constant until burn out.