  We explored the statistical and compositional link between Chelyabinsk
meteoroid and potentially hazardous asteroid (86039) 1999 NC43 to investigate
their proposed relation proposed by Borovi\v{c}ka et al. (2013). Using detailed
computation we confirm that the orbit of the Chelyabinsk impactor is
anomalously close to 1999 NC43. We find about (1-3) x 10-4 likelihood of that
to happen by chance. Taking the standpoint that the Chelyabinsk impactor indeed
separated from 1999 NC43 by a cratering or rotational fission event, we run a
forward probability calculation, which is an independent statistical test.
However, we find this scenario is unlikely at the about (10-3 -10-2) level. We
also verified compositional link between Chelyabinska and 1999NC43.
Mineralogical analysis of Chelyabinsk (LL chondrite) and (8) Flora (the largest
member of the presumed LL chondrite parent family) shows that their olivine and
pyroxene chemistries are similar to LL chondrites. Similar analysis of 1999
NC43 shows that its olivine and pyroxene chemistries are more similar to L
chondrites than LL chondrites (like Chelyabinsk). We also took photometric
observations of 1999 NC43 over 54 nights during two apparitions (2000, 2014).
The lightcurve of 1999 NC43 resembles simulated lightcurves of tumblers in
Short-Axis Mode with the mean wobbling angle 20-30 deg. While, a mechanism of
the non-principal axis rotation excitation is unclear, we can rule out the
formation of asteroid in disruption of its parent body as a plausible cause, as
it is unlikely that the rotation of an asteroid fragment from catastrophic
disruption would be nearly completely halted. Considering all these facts, we
find the proposed link between the Chelyabinsk meteoroid and the asteroid 1999
NC43 to be unlikely.
