On the night of Oct 31 , 2015 two bright Southern Taurid fireballs occurred over Poland , being one of the most spectacular bolides of this shower in recent years .
The first fireball - PF311015a Okonek - was detected by six video stations of Polish Fireball Network ( PFN ) and photographed by several bystanders , allowing for precise determination of the trajectory and orbit of the event .
The PF311015a Okonek entered Earth ’ s atmosphere with the velocity of 33.2 \pm 0.1 km/s and started to shine at height of 117.88 \pm 0.05 km .
The maximum brightness of -16.0 \pm 0.4 mag was reached at height of 82.5 \pm 0.1 km .
The trajectory of the fireball ended at height of 60.2 \pm 0.2 km with terminal velocity of 30.2 \pm 1.0 km/s .

The second fireball - PF311015b Ostrowite - was detected by six video stations of PFN .
It started with velocity of 33.2 \pm 0.1 km/s at height of 108.05 \pm 0.02 km .
The peak brightness of -14.8 \pm 0.5 mag was recorded at height of 82.2 \pm 0.1 km .
The terminal velocity was 31.8 \pm 0.5 km/s and was observed at height of 57.86 \pm 0.03 km .

The orbits of both fireballs are similar not only to orbits of Southern Taurids and comet 2P/Encke , but even closer resemblance was noticed for orbits of 2005 UR and 2005 TF50 asteroids .
Especially the former object is interesting because of its close flyby during spectacular Taurid maximum in 2005 .
We carried out a further search to investigate the possible genetic relationship of Okonek and Ostrowite fireballs with both asteroids , that are considered to be associated with Taurid complex .
Although , we could not have confirmed unequivocally the relation between fireballs and these objects , we showed that both asteroids could be associated , having the same origin in a disruption process that separates them .