Reports Report 4500cs (Event 4500-2017)

This report has been linked to the following event: Event 4500-2017
Observer
NameAllan W
Experience Level4/5
RemarksAs an Orange County Park volunteer, I host star parties on the Saturday of the new moon each month. Just as our star party was beginning, we saw this amazing fireball. It originated fairly high up, and was descending SSW. It flared at least three times in its descent. There was immediate fragmentation and multiple colors (predominantly white, yellow and red) at each flair. The last flare was terminal. Subsequently, there were sonic booms and echoes within the surrounding hills. I have witnessed multiple fireballs and this one was the second-most significant (in size and duration). It was witnessed by three other volunteers and multiple park visitors.
Location
AddressSan Juan Capistrano, CA
Latitude33° 32' 11.57'' N (33.54°)
Longitude 117° 33' 11.71'' W (-117.55°)
Elevation135.07m
Time and Duration
Local Date & Time2017-11-18 17:29 PST
UT Date & Time2017-11-19 01:29 UT
Duration≈3.5s
Direction
Moving directionFrom up left to down right
Descent Angle163°
Moving
Facing azimuth159.85°
First azimuth166.92°
First elevation73°
Last azimuth169.42°
Last elevation25°
Brightness and color
Stellar Magnitude-11
ColorOrange, Yellow, Light Yellow, White
Concurrent Sound
ObservationYes
RemarksMultiple bangs (sound barriers)
Delayed Sound
ObservationYes
RemarksEchoes of sound barriers
Persistent train
ObservationNo
Duration-
Length-
Remarks-
Terminal flash
ObservationYes
RemarksThere were several flashes (at least three) then a terminal flash. Each flash was triangular and bright yellow with red.
Fragmentation
ObservationYes
RemarksAt each flash there was substantial fragmentation (stardust)