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Observation of the A Carinid Meteor Shower 2020 Unexpected Outburst

Bruzzone, Juan Sebastian and Weryk, Robert J. and Janches, Diego and Baumann, Carsten and Stober, Gunter and Hormaechea, Jose Luis (2021) Observation of the A Carinid Meteor Shower 2020 Unexpected Outburst. The Planetary Science Journal, 2 (2), p. 56. Institute of Physics (IOP) Publishing. doi: 10.3847/PSJ/abe9af. ISSN 2632-3338.

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We present observations of the sudden outburst of the A Carinid meteor shower recorded with the Southern Argentina Agile MEteor Radar Orbital System (SAAMER-OS) near the south toroidal sporadic region. The outburst peaked between 21 UT and 22 UT on 2020 October 14 and lasted 7 days (199° ≤ λ ⊙ ≤ 205°), with a mean Sun-centered geocentric ecliptic radiant of λ g − λ ⊙ = 271.°04, β g = −76.°4, and a geocentric speed of 33.3 km s−1. Assuming a mass index value of s = 2.0, we compute a peak 24 hr average flux of 0.029 meteoroids km−2 hr−1 to a limit of 9th magnitude, which is equivalent to a zenithal hourly rate (ZHR) of 5.7 and comparable to other established showers with similar mass indices. By further estimating the peak fluxes for other typical mass index values, we find that the outburst likely never exceeded a maximum ZHR of ∼44, well below the activity of other strong showers. The mean orbital elements resemble those of a short-period object, a = 3.5 ± 0.1 au, q ≃ 1 au, e = 0.72 ± 0.02, i = 55.°8 ± 0.°3, ω = 1° ± 173°, and Ω = 21.°7, and are similar to those derived for two previous shower outbursts observed with SAAMER-OS at high southern ecliptic latitudes. Using the criterion did not reveal a parent object associated with this shower in the known object catalogs.

Item URL in elib:https://elib.dlr.de/143593/
Document Type:Article
Title:Observation of the A Carinid Meteor Shower 2020 Unexpected Outburst
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Bruzzone, Juan SebastianDepartment of Physics, Catholic University of America, 620 Michigan Avenue NE, Washington, DChttps://orcid.org/0000-0002-2731-0397UNSPECIFIED
Weryk, Robert J.ITM Physics Laboratory,NASA/Goddard Space Flight Center, 8800 Greenbelt Roadhttps://orcid.org/0000-0002-0439-9341UNSPECIFIED
Janches, DiegoITM Physics Laboratory,NASA/Goddard Space Flight Center, 8800 Greenbelt Roadhttps://orcid.org/0000-0001-8615-5166UNSPECIFIED
Baumann, CarstenUNSPECIFIEDhttps://orcid.org/0000-0001-7104-5992UNSPECIFIED
Stober, GunterInstitute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics, University of Bern, Bern, Switzerlandhttps://orcid.org/0000-0002-7909-6345UNSPECIFIED
Hormaechea, Jose LuisFacultad de Ciencias Astronomicas y Geofísicas, Universidad Nacional de La Plata, Argentinahttps://orcid.org/0000-0003-4533-3282UNSPECIFIED
Date:16 March 2021
Journal or Publication Title:The Planetary Science Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:p. 56
Publisher:Institute of Physics (IOP) Publishing
Keywords:Meteor showers; Meteors; Radar astronomy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Project Space weather research
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Space Weather Impact
Deposited By: Baumann, Carsten
Deposited On:13 Sep 2021 15:10
Last Modified:21 Dec 2022 04:12

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