Malcolm asked: >How do you determine a radiant size based on two >meteors? Is this the angular separation of the two >radiants, possibly multiplied by some fudge factor? They used a radiant motion derived by Jacchia et al. (1950), ApJ 111, 104. The value for the radiant size is the median total deviation of the two meteors from that radiant motion. In this case it's just the average deviation of the two. Rainer