Bibliographic record
Abstract
We measure the activity and orbital characteristics of the η-Aquariid meteor shower appropriate to meteoroids of 200 μm size (mass ≈ 5–10 μg) based on ∼4 × 104 stream orbits measured by the Canadian Meteor Orbit Radar during the years 2002–2014. Significant activity from the stream is found to last from April 25–May 21 (λ⊙ = 35°–60°) with the shower detectable approximately one week on either side of these dates just above the median background. The radiant at peak activity (λ⊙ = 45|$_{.}^{\circ}$|5) is located at αg = 337|$_{.}^{\circ}$|8, δg = −0|$_{.}^{\circ}$|6 and shows a consistent drift of Δαg = +0|$_{.}^{\circ}$|69, Δδg = +0|$_{.}^{\circ}$|60. The velocity of the stream throughout its active period remains within ≈1 km s−1 of Vg = 64.3 km s−1 found at the peak; however, there are indications this is an underestimate due to undercorrection for stream meteoroids having larger than average deceleration. The activity profile shows no mass dependence between μg to mg sizes, but a clear asymmetry with the slope of the ascending branch having B+ = 0.135 ± 0.003 and the descending branch B− = 0.078 ± 0.003. The average yearly equivalent radar-measured peak Zenithal Hourly Rate (ZHR) is 50–80 from 2002–2014, with outbursts in 2004 and 2013 exceeding ZHRs of 100. The mass index shows a minimum at the time of the flux maximum with 1.8 ≤ s ≤ 1.9.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".