Optical fluxes and meteor properties of the camelopardalid meteor shower

Campbell-Brown, M.; Blaauw, R.; Kingery, Aaron

doi:10.1016/j.icarus.2016.05.001

Cited by 12 publications

(5 citation statements)

References 14 publications

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“…This is reflected in the effective collection area method for measuring fluxes, which depends only on limiting magnitude. The second reason is that there are multiple competing formulae for converting magnitude to mass (Jacchia et al 1967;Verniani 1973;Campbell-Brown et al 2016), and therefore the conversion of magnitude to mass creates another opportunity to introduce discrepancies that arise from different assumptions rather than real differences in the data.…”

Section: Discussionmentioning

confidence: 99%

A Reference Meteor Magnitude for Intercomparable Fluxes

Moorhead,

Vida,

Brown

et al. 2024

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The rate at which meteors pass through Earth’s atmosphere has been measured or estimated many times over; existing flux measurements span at least 12 astronomical magnitudes, or roughly five decades in mass. Unfortunately, the common practice of scaling flux to a universal reference magnitude of +6.5 tends to collapse the magnitude or mass dimension. Furthermore, results from different observation networks can appear discrepant due solely to the use of different assumed population indices, and readers cannot resolve this discrepancy without access to magnitude data. We present an alternate choice of reference magnitude that is representative of the observed meteors and minimizes the dependence of flux on population index. We apply this choice to measurements of recent Orionid meteor shower fluxes to illustrate its usefulness for synthesizing independent flux measurements.

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Section: Discussionmentioning

confidence: 99%

A Reference Meteor Magnitude for Intercomparable Fluxes

Moorhead,

Vida,

Brown

et al. 2024

Self Cite

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“…The wavelet peak around RA = 358.3°, Dec = 75.4° is associated with the 2014 May Camelopardalid outburst, which is not included in the MDC but was both predicted and detected (Brown ; Ye and Wiegert ; Campbell‐Brown et al. ). This is therefore an example of a false negative by our DBSCAN‐based algorithm.…”

Section: Validationmentioning

confidence: 98%

Meteor shower detection with density‐based clustering

Sugar

Moorhead

Brown

et al. 2017

Meteorit & Planetary Scien

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We present a new method to detect meteor showers using the density-based spatial clustering of applications with noise algorithm (DBSCAN;Ester et al. 1996). The DBSCAN algorithm is a modern cluster detection algorithm that is well suited to the problem of extracting meteor showers from all-sky camera data because of its ability to efficiently extract clusters of different shapes and sizes from large data sets. We apply this shower detection algorithm on a data set that contains 25,885 meteor trajectories and orbits obtained from the NASA All-Sky Fireball Network and the Southern Ontario Meteor Network (SOMN). Using a distance metric based on solar longitude, geocentric velocity, and Sun-centered ecliptic radiant, we find 25 strong cluster detections and six weak detections in the data, all of which are good matches to known showers. We include measurement errors in our analysis to quantify the reliability of cluster occurrence and the probability that each meteor belongs to a given cluster. We validate our method through false-positive/negative analysis and with a comparison to an established shower detection algorithm.

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“…For comparison, the background sporadic meteor flux at millimeter sizes is 0.18 ± 0.04 km −2 hr −1 (Campbell-Brown & Braid 2011) as measured by video meteor techniques, while a weak meteor shower might be two orders of magnitude less e.g. the 2016 Camelopardalids (Campbell-Brown et al 2016). So the DART-produced fluxes are certainly low: could they be detected?…”

Section: Impact On 1 Oct 2022 Direct Arrivalmentioning

confidence: 99%

On the Delivery of DART-ejected Material from Asteroid (65803) Didymos to Earth

Wiegert

2020

Planet. Sci. J.

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The DART spacecraft is planned to impact the secondary of the binary asteroid (65803) Didymos in 2022, to assess deflection strategies for planetary defense. The impact will create a crater and release asteroidal material, some of which will escape the Didymos system. Because the closest point of approach of Didymos to Earth's orbit is only 6 million km (about 16 times the Earth-Moon distance), some ejected material will make its way sooner or later to our planet, and the observation of these particles as meteors would increase the scientific payout of the DART mission. The DART project may also represent the first human-generated meteoroids to reach Earth, and a test case for human activity on asteroids and its eventual contribution to the meteoroid environment and spacecraft impact risk. This study examines the amount and timing of the delivery of meteoroids from Didymos to near-Earth space.This study finds that very little DART-ejected material will reach our planet, and most of that only after thousands of years. But some material ejected at the highest velocities could be delivered to Earth-crossing trajectories almost immediately, though at very low fluxes. Timing and radiant directions for material reaching Earth are calculated, though the detection of substantial numbers would indicate more abundant and/or faster ejecta than is expected.The DART impact will create a new meteoroid stream, though probably not a very dense one. However, larger, more capable asteroid impactors could create meteoroid streams in which the particle flux exceeds that naturally occurring in the Solar System, with implications for spacecraft safety.

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Optical fluxes and meteor properties of the camelopardalid meteor shower

Cited by 12 publications

References 14 publications

A Reference Meteor Magnitude for Intercomparable Fluxes

A Reference Meteor Magnitude for Intercomparable Fluxes

Meteor shower detection with density‐based clustering

On the Delivery of DART-ejected Material from Asteroid (65803) Didymos to Earth

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