English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

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

Link between the Potentially Hazardous Asteroid (86039) 1999 NC43 and the Chelyabinsk meteoroid tenuous