Observations of an Unexpected Meteor Shower Outburst at High Ecliptic Southern Latitude and Its Potential Origin

A strong and unexpected meteor shower outburst was observed by the Southern Argentina Agile MEteor Radar Orbital System (SAAMER-OS) at high southern ecliptic latitude within the South Toroidal region. The outburst, which was active throughout solar longitudes 351 degrees and 352 degrees, peaked at 09:30 UT on 2020 March 12, has a mean Sun-centered ecliptic radiant of lambda - lambda(0) similar to 307 degrees.5 and beta similar to -77 degrees.2 and a geocentric velocity of 30.7 km s(-1). Using the D' parameter criterion, we find the corresponding orbital elements of the outburst to match well with both the beta Tucanid and delta Mensid meteor showers, suggesting these are in fact the same shower. We also find a promising parent candidate in asteroid (248590) 2006 CS, a large (D similar to 2 km) highly inclined 52 degrees near-Earth object.