Posted by Richard Miles at 23:32 on 2013 Feb 28
Nick,Very close-approaching asteroids are accelerated / gravity slingshot by the mass of the Earth and no ordinary planetary programme can deal with this without a dedicated fix for each object in question. You need to use precise obtain your local topocentric RA and Dec coordinates from websites such as can be found at:Minor Planet Center ephemeris serviceJPL HORIZONS Web-InterfaceNEODyS-2Bill,Have put in a couple of links to your YouTube video on the ARPS webpages. Let me have some details about your location/telescope/ camera used – nice animation I must say. Thanks.Richard Miles