Abstract :
[en] P. Jenniskens, SETI Institute and NASA Ames Research Center, reports that a new compact meteor shower with a long-period-comet type of orbit was detected by the southern-hemisphere CAMS networks on June 10 (cf. website URL http://cams.seti.org/FDL/ for date of June 10). Four orbits were measured by CAMS New Zealand, which is coordinated by J. Baggaley (University of Canterbury); three orbits were measured by CAMS Namibia, coordinated by T. Hanke (the H.E.S.S. Collaboration); and two orbits were measured by CAMS Chile, coordinated by S. Heathcote (AURA/Cerro Tololo) and E. Jehin (University of Liege). The shower, now called the chi Phoenicids (IAU shower 1036), radiated from geocentric radiant R.A. = 35.0 +/- 1.0 deg, Decl. = -41.7 +/- 0.5 deg (equinox J2000.0), with geocentric velocity 50.6 +/- 0.8 km/s during solar longitude 78.9-80.0 deg (centered on 79.6 +/- 0.3 deg), corresponding to 2020 June 9d15h-10d18h UTC. The nine measured orbits have median orbital elements a around 23 AU, q = 0.926 +/- 0.006 AU, e = 0.960 +/- 0.006, i = 90.2 +/- 1.0 deg, Peri. = 324.9 +/- 1.4 deg, and Node = 259.6 +/- 0.3 deg (equinox J2000.0). The shower is compact but more dispersed than measurement error, suggesting it may be an annual shower.
