Guess I have a new meteor term to learn: "anthelion radiant" - something the Int'l Meteor Assoc. adopted for the background 1-3 meteors per hour that we usually see. Basically, its the near Earth orbit cloud of debris and at about 30 degs opposite the Sun each night throughout the year, a few hit the Earth. The IMO is considering folding a number of the traditional lesser annual meteor radiants into one definition - the antihelion radiant. http://www.dl1dbc.net/Meteorscatter/meteortopics.html There's a couple of articles on this in the IMO's publication - the WGN, the Journal of the IMO (or WGN-JIMO). If anyone here is an IMO member and subscribes, I was wondering if I could barrow a couple of the two key articles listed below. - Kurt Jürgen Rendtel: Fundamentals of meteor science; Visual Sporadic Meteor Rates. WGN, The Journal of the IMO 34:3 (2006), pp. 71-76 Robert Lunsford: Fundamentals of meteor science: The anthelion radiant. WGN, The Journal of the IMO 32:3 (2004), pp. 81-83 _______________________________________________ Sent via CSolutions - http://www.csolutions.net