Abstract :
[en] P. Jenniskens, SETI Institute and NASA Ames Research Center, reports that the CAMS low-light video surveillance networks in Australia, South Africa, Namibia, and Chile recorded an outburst of slow meteors from a compact radiant between the constellations Delphinus and Aquila on 2020 Aug. 20/21 (cf. website URL http://cams.seti.org/FDL/ for date of Aug. 21). The shower may be ongoing. Meteors radiated from a geocentric radiant at R.A. = 304.7 +/- 1.0 deg, Decl. = +8.5 +/- 1.0 deg, with geocentric velocity 17.0 +/- 0.4 km/s during solar longitude 147.6-148.4 deg, corresponding to Aug. 20.50-21.29 The eight measured orbits have median orbital elements a = 2.95 +/- 0.17 AU, q = 0.830 +/- 0.008 AU, e = 0.716 +/- 0.017, i = 12.7 +/- 0.6 deg, Peri. = 235.3 +/- 1.3 deg, and Node = 148.0 +/- 0.3 deg (equinox J2000.0). The longitude of perihelion of the median orbit is 23.5 +/- 1.3 deg. The meteoroids appear to originate from an unknown Jupiter-family comet. The CAMS automated software identified this shower as the Chi Cygnids (IAU shower number 757), first detected by CAMS in 2015 during the period Sept. 14-25 (cf. Jenniskens, CBET 4144; Koukal et al. 2016, JIMO 44, 5). That shower had a higher inclination of i = 18.6 +/- 1.6 deg with a radiant in the constellation Cygnus, but the same longitude of perihelion of 21.5 +/- 1.9 deg. <P />CAMS Namibia is coordinated by T. Hanke (the H.E.S.S. Collaboration), CAMS Chile by S. Heathcote (AURA/Cerro Tololo) and E. Jehin (University of Liege), CAMS Australia by M. Towner (Curtin University), and CAMS South Africa by T. Cooper (Meteor Section, Astronomical Society of Southern Africa).