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Centaur
2011-Aug-29, 07:04 PM
Iíve created graphics related to Comet C/2009 P1 (Garradd). They can be seen at www.CurtRenz.com/comets

The first is a view from north of the solar system showing comet passing through our neighborhood. The image is parallel to the ecliptic (Earthís orbital) plane. Keep in mind that the cometís orbital plane is inclined to the ecliptic by 106į (or 74į but retrograde) so the cometís graphical image should be imagined as being much closer than that of the Earth. The other two graphics are mappings of the comet in equatorial coordinates of the current date (not 2000.0).

Based on the current JPL orbital solution, I calculate that the comet should reach perihelion (closest to Sun) of 1.551 AU on 2011 DEC 23. Its peak brilliance at magnitude +8.7 should occur around 2012 FEB 23, and perigee (closest to Earth) of 1.266 AU should be achieved on 2012 MAR 05.