F1 Mellish. The radiants might look like an extension of the MON activity, however, the shower might be active during the MON activity. The geocentric velocity is similar $v_{g}\sim 40$km/s. The maximum activity of 11 Canis Minorids is expected at $L_{\odot}=252.4$$^\circ$ (December 3).

Now, the December Monocetorids and November Orionids are weak (few meteors per hour at maximum) but annual established meteor showers. The shower 11 Canis Minorids, (December Canis Minorid according to IAU nomenclature) is classified as a “working” shower. Despite several investigations, past publications analyzed only a small number of orbits and provided disperse data on the mean orbit, the position of radiant, the activity and precision of orbits, and did not reveal the orbital evolution of the meteoroid particles released from the parent comet, in order to explain the current state of these meteor showers. A significant number of the analyzed orbits are hyperbolic or parabolic.

This work uses recent and precise video multi-station orbits, obtained by the SonotaCo video network in Japan, which provide the highest number of relatively precise meteor orbits detected continually between the years $2007-2009$. The network operates with over 25 similar video-optical systems and uses the same software for meteor detection and 