Reports Report 2271c (Event 2271-2021)

Observer
Name Martin S
Experience Level 3/5
Remarks It was more than 12 seconds.. I was walking and facing the opposite direction and I don't know why I turned around and I saw it first with the white of my eye, so I didn't see it's actual start. And it didn't burned, I think it survived. In around the 10.5 second it stopped burning, it's tail disappeared and it turned in red-orange color still flying with the same speed and direction and it slowly became invisible. Like it cooled down. I'm 99% sure it survived and has hit the ground somewhere. How can I help (potentially) finding it? I've seen hundreds of meteorites but nothing like this one. It was........ I perfectly know what I saw.
Location
Address Sofia, Sofia City Province (BG)
Latitude 42° 48' 23.89'' N (42.806636°)
Longitude 23° 26' 12.21'' E (23.436724°)
Elevation 677.906067m
Time and Duration
Local Date & Time 2021-04-12 21:00 EEST
UT Date & Time 2021-04-12 18:00 UT
Duration ≈20s
Direction
Moving direction From up right to down left
Descent Angle 269°
Moving
Facing azimuth 220.98°
First azimuth 264.65°
First elevation 65°
Last azimuth 164.79°
Last elevation 61°
Brightness and color
Stellar Magnitude -15
Color Light Blue, White
Concurrent Sound
Observation No
Remarks -
Delayed Sound
Observation No
Remarks -
Persistent train
Observation No
Duration -
Length -
Remarks -
Terminal flash
Observation No
Remarks -
Fragmentation
Observation Yes
Remarks Around the 5th second, 2-3 small pieces detached from it but they didn't affect the meteor at all