Abstract :
[en] P. Jenniskens, SETI Institute and NASA Ames Research Center, reports that southern-hemisphere networks of the CAMS video-based meteoroid orbit survey detected a meteor outburst from an eccentric sunskirting-comet orbit on 2021 June 9d22h-14d01h UTC, corresponding to solar longitude 79.0-83.0 deg (equinox J2000.0; cf. the green cluster just below the ecliptic plane in the radiant-data visualization posted at website URL http://cams.seti.org/FDL/ for the dates 2021 June 10-13). The shower was detected in observations of the CAMS/Namibia low-light video camera network (T. Hanke, E. Fahl, R. van Wyk), with additional detections by CAMS/Australia (M. Towner), CAMS/Chile (S. Heathcote and E. Jehin), CAMS/South Africa (T. Cooper), and CAMS/New Zealand (J. Baggaley). The meteors radiated from a geocentric radiant R.A. = 304.4 deg, Decl. = -32.9 deg (equinox J2000.0) with geocentric velocity 36.9 km/s. The median orbital elements of 52 triangulated meteors are a = 1.05 +/- 0.19 AU, q = 0.070 +/- 0.008 AU, e = 0.932 +/- 0.015, i = 49.6 +/- 5.9 deg, Peri. = 158.2 +/- 0.8 deg, Node = 260.5 +/- 1.1 deg (equinox J2000.0). Similar activity was detected last year, from 2020 June 6 to 14, with a broad maximum on June 10 at solar longitude 79.7 deg, but not in prior years from 2011 to 2019. The shower has a compact radiant off-center from that of shower 165 (Southern June Aquillids), which will increase in activity later this month, and the radar-detected shower 765 (alpha Sagittariids). This shower is now called the June theta^2 Sagittariids and was added to the IAU Working List of Meteor Showers as number 1129.
