Abstract :
[en] P. Jenniskens, SETI Institute and NASA Ames Research Center, reports that the CAMS low-light video camera networks have detected an ongoing outburst of meteors with low-inclinatioon orbits in the anti-helion source (c.f. website URL http://cams.seti.org/FDL/ for the date of 2022 Aug. 16). Now that IAU Commission F1 has introduced a new meteor-shower designation system, which assigns a temporary designation based on the time of the report, this shower is called M2022-Q1 and will likely be named the "18-Aquariids". A total of thirty-six meteors were triangulated between 2022 Aug. 15d20h37m and 16d12h02m UT, but the shower is ongoing beyond this time (e.g., see website URL http://cams.seti.org/FDL/for the date of 2022 Aug. 17). The radiant around solar longitude 143.1 deg was centered on the median geocentric position R.A. = 324.7 +/- 0.2 deg, Decl. = -11.6 +/- 0.3 deg (equinox J2000.0), with geocentric velocity 24.2 +/- 0.3 km/s. The median orbital elements are a = 3.16 AU, q = 0.547 +/- 0.025 AU, e = 0.823 +/- 0.069, i = 1.90 +/- 1.30 deg, Peri. = 270.7 +/- 2.3 deg, aNode = 143.2 +/- 0.7 deg. Perhaps coincidentally, this orbit resembles that of lost comet D/1770 L1 (Lexell) during its returns in 1770 and 1776 (a = 3.15 AU, q = 0.674 AU, e = 0.786, i = 1.55 deg, Peri. = 225.0 deg, Node = 134.5 deg). The following CAMS networks contributed to this report: nine meteors were detected by LO-CAMS (coordinated by N. Moskovitz), seven meteors were detected by CAMS California (station operators T. Beck, J. Albers, E. Egland, and B. Grigsby), seven 18-Aquariid meters by CAMS Chile (S. Heathcote, E. Jehin), five shower meteors by CAMS Florida (A. Howell), three shower meteors by CAMS Texas (W. Cooney), two shower meteors by CAMS Arkansas (L. Juneau), two shower meteors by CAMS Namibia (T. Hanke), and one meteor by CAMS South Africa (T. Cooper).
