Erratum: Calculation of the mean orbit of a meteoroid stream

Jopek, T. J.; Rudawska, Regina; Prętka-Ziomek, H.

doi:10.1111/j.1365-2966.2008.12554.x

Cited by 2 publications

(2 citation statements)

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“…The mean values of the radiant coordinates α g , δ g and the Öpik variables V g , θ, φ are the arithmetic means of the components of the radiant (antiradiant) unit vector and the geocentric velocity vector. The mean values of the orbital elements a , q , e , ω, Ω, i were calculated by the method described in Jopek, Rudawska & Predka‐Ziomek (2006, 2008a,b). When the identified stream consisted of seven or less members, the mean orbital elements were found by the mean arithmetic method.…”

Section: Results Of the Streams Searchingmentioning

confidence: 99%

Meteoroid streams identification amongst 231 Southern hemisphere video meteors

Jopek

Koten

Pećina

2010

Monthly Notices of the Royal Astronomical Society

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In this study, 231 video meteoroid orbits observed at the Southern hemisphere were searched for streams. Several searches have been made using three D‐criteria: DSH, DN and DV. The mutual D‐distances were processed by a cluster analysis algorithm based on the single neighbour linking technique. The values of the meteoroid association thresholds for groups of 2, 3, 4, … members were estimated by the statistical approach. In all three basic searches, about 29–33 per cent of the meteoroid sample turned out to belong to the stream component. The following streams have been detected: η Aquariids (ETA, #31), χ Capricornids (CCA, #420), May Microscopiids (MMI, #421), Northern and Southern Librids‐Luppids (NLL, #422; SLL, #423) and Northern and Southern May Ophiuchids (NOP, #149; SOP, #150). 12 η Aquariids were detected using each D‐function. Their mean orbital elements resemble the orbit of 1P/Haley; however, the mean semimajor axis and the activity time differ significantly from those determined by the other observers. 10 members of χ Capricornids and five members of May Microscopiids were found using the DN function only. For these streams, we did not find any counterparts among the streams listed in the IAU MDC. Our Librids‐Luppids and Ophiuchids form two separate complex groups which consist of 16 and 18 members, respectively. From a viewpoint of the cluster analysis technique, they are reliable significant structures. Our Ophiuchids are similar to the already known Northern and Southern May Ophiuchids. Near the mean radiant of Librids‐Luppids, we do not see any radiant of the known shower. Its possible counterpart, the Southern ω Scorpiids, has a radiant significantly shifted from our Librids‐Luppids. Thus, we consider Librids‐Luppids as a new stream or some new manifestation of the May Ophiuchids Complex. Also, this study has shown us that in case of complex structures, traditional procedures of meteor showers distinction are not sufficient tool to give unambiguous answers.

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Section: Results Of the Streams Searchingmentioning

confidence: 99%

Meteoroid streams identification amongst 231 Southern hemisphere video meteors

Jopek

Koten

Pećina

2010

Monthly Notices of the Royal Astronomical Society

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“…By 'averaged' values we mean values calculated as an ordinary arithmetic means of individual parameters or averaged using the method given by (author?) [31,32,33] or as median values of individual parameters.…”

Section: Incomplete Shower Datamentioning

confidence: 99%

Modification of the Shower Database of the IAU Meteor Data Center

Hajduková

Rudawska

Jopek³

et al. 2023

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Context. The Shower Database (SD) of the Meteor Data Center (MDC) has been operating for 15 yr and is used by the entire community of meteor astronomers. It contains meteor showers categorised in individual lists on the basis of their status. Since the inception of the SD, no objective rules for moving showers between individual lists have been established. The content of the SD has not yet been checked for the correctness of the meteor data contained therein. Aims. Our aims are (1) to formulate criteria for nominating meteor showers for established status, (2) to improve the rules for the removal of showers, (3) to verify and enhance the content of the SD, and (4) to improve the user area of the MDC SD. Methods. The criteria for moving showers from the Working list to the Lists of established or removed showers were generated using an empirical evaluation of their impact on the registered showers. The correctness of the parameters of each stream included in the SD was checked by comparing them with the values given in the source publications. Results. We developed a set of criteria for nominating showers to be established. We objectified rules for the temporary and permanent removal of meteor showers from the Working list. Both of our proposed new procedures were approved by a vote of the commission F1 of the IAU in July 2022. We verified more than 1350 data records of the MDC SD and introduced ~1700 corrections. We included new parameters for shower characterisation. As a result of our verification procedure, 117 showers have been moved to the List of removed showers. As of October 2022, the SD contains 923 showers, 110 of which are in the List of established showers and 813 are in the Working list. We also improved the user area of the SD and added a simple tool to allow a quick check of the similarity of a new shower to those in the database.

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Erratum: Calculation of the mean orbit of a meteoroid stream

Cited by 2 publications

References 1 publication

Meteoroid streams identification amongst 231 Southern hemisphere video meteors

Meteoroid streams identification amongst 231 Southern hemisphere video meteors

Modification of the Shower Database of the IAU Meteor Data Center

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