Bibliographic record
Abstract
In 2009 two bright fireballs of the -9.2 and -8.5 maximum absolute magnitudes and with initial masses of the meteoroids produced fireballs of 5.7 and 7.8 kg were captured by the Tajikistan fireball network. It turned out, that the coordinates of radiants and orbits of fireballs, which according to the PE criterion have asteroidal origin, are nearly identical to each other. Three meteorite-dropping fireballs with the similar parameters earlier were recorded by the MORP camera network in Canada. We undertook a search for the possible progenitor of this group among the near-Earth asteroids (NEAs). It was found that their orbits are very close to the orbit of the NEA 2004MB6 that is confirmed by their mutual values of the Southworth and Hawkins D-criterion. For verification of the revealed association the orbital evolution of the 2004MB6 and the meteoroid produced TN170809a was investigated. As a result, both objects have well coincidence of the secular perturbations of orbital elements and the values of the modified D-criterion do not exceed the value of 0.14 during the all time. We suggested that a source of origin of the meteorite-dropping fireballs under consideration, probably, are fragments of the NEA 2004MB6 and these large bodies were constituent components of the asteroidal meteoroid stream for which the asteroid 2004MB6 is the progenitor.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".