[Meteorite-list] re: Astroids associated with meteorites (McSween)
From: MexicoDoug_at_aol.com <MexicoDoug_at_meteoritecentral.com>
Date: Mon May 30 03:51:49 2005 Message-ID: <12b.5e123696.2fcc200f_at_aol.com> Elton wrote: >Hello Jerry, >You probably are thinking of "Meteorites and Their Parent Bodies" 2nd >Edition by Harry (Hap ) McSween, Jr Hola Jerry, Regarding Asteroids, I also highly recommend "Meteorites and Their Parent Planets" Second ed. It's a book that always has a new gem of "interesting information waiting for you when you pick it up. A guide to echinoids, asteroids and crinoids:) is also useful if you like Earthly asteroids, but: The nicest astroids are actually from the imaginations of kids that prefer math to fingerpainting. Did you ever have a Spirograph(R) set when you were growing up? The basic astroid can be drawn with a ring whose radius is 4 times the radius of a circle you trace inside it resulting in a diamond shape with concave shapes. If you vary the length you get cycloidal designs (including awesome psychedelic astroid families best in two or three colors - which kept me for one, very occupied in those younger days for longer than I'll likely admit, and probably still would if I had a set.) And in elliptical orbits, that same concaved sided diamond astroid shape can be used to constrain (form an envelope which contains the orbital ellipse) of it if the average of the aphelion and perihelion are known, but not their indivual values which could come in handy with comets or even meteoroids if you are really into this stuff. Hope this adds another dimension to the question...Saludos, Doug Received on Mon 30 May 2005 03:51:43 AM PDT |
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