V. Porubcan et al., ON THE 1986 URSIDS METEOR-SHOWER OBSERVED AT BUDRIO, Nuovo cimento della Societa italiana di fisica. C, Geophysics and space physics, 16(2), 1993, pp. 205-209
Outburst in activity of the 1986 Ursids reported from visual observati
ons was observed also by the Budrio meteor radar. The radar maximum co
nsisting mainly of long-duration echoes preceded the visual one by abo
ut half an hour. The peak appeared on December 22, 20:49 UT (solar lon
gitude 270-degrees.202). The mean photographic orbit of the Ursids sho
wer was derived and compared with that of the parent comet Tuttle.