Asteroid 3956, Caspar, was discovered on November 3, 1988 by Poul Jensen at Brorfelde Observatory near Holbaek, Zealand, Denmark. It has a period of 3 years, 128 days.
It was named for Jensen's grandson, Caspar Karstensen.
The astrological meaning seems to be what its name might suggest: friendly to kids (Raymond Scott); white, pallid, blanched, something valuable to offer, giving tribute.