Longitude of perihelion as a function of perihelion distance. Different symbols correspond to different inclination intervals (see the legend). Meteoroids belonging to major meteor showers (Southern δ Aquariids, Geminids, December Monocerotids, Taurids, η Virginids, and χ Orionids) are highlighted. Minor showers σ Hydrids (HYD) and ξ² Capricornids (XCS) are also marked. The excess of sporadic meteoroids with q < 0.11 AU at is notable.