Asteroidal Activity Amongst Meteor Datasets: Confirmed New "Rock-Comet'' Stream and Search for a Tidal Disruption Signature

Asteroid activity (e.g., thermo-mechanical breakdown, impacts, rotational shedding, tidal disruption, etc.) can inject meteoroids into near-Earth space and leave detectable signatures in orbit catalogs. We searched for such recent signatures using orbit-similarity statistics and explicit null-hypothesis testing applied to shower-removed, asteroidal video-meteor datasets. Our sample comprises 235,271 meteors and fireballs from four all-sky video networks (GMN, CAMS, EDMOND, and SonotaCo). For meteors we use the geocentric dissimilarity criterion DN and construct KDE-based sporadic null realizations to evaluate (i) global cumulative similarity distributions and (ii) localized DN-conditioned (DN < 0.015) pair-excess maps in the (U, λ⊙) plane; we additionally apply DBSCAN (ϵ = 0.03, min samples = 2) to isolate the coherent, statistically significant structures. We find no survey-consistent, stream-like signature in the Earth-like, low-inclination region expected for a distinct recent tidal-disruption family; instead, significant-bin membership implies, under our adopted detection thresholds and binning, a conservative combined upper limit of ≤ 53/235,271 (≤ 2.3 × 10−4) for sporadic asteroidal meteors plausibly attributable to a detectable recent tidal-disruption-like contribution. In contrast, we confirm the detection of a new diffuse southern Virginid-region stream: GMN exhibits a local z-score of 6.32 relative to the KDE-null mean in the U − λ⊙ phase space (global significance of 5.3 σ), with weaker supporting excess in SonotaCo and EDMOND. DBSCAN isolates N = 282 members (243 GMN plus additional SonotaCo, CAMS, and EDMOND) on a low-perihelion, asteroidal orbit (q = 0.22±0.01 au, i = 12.3° ± 1.8°, TJ = 4.6 ± 0.3) consistent with near-Sun thermo-mechanical “rock-comet” activity.