Question: What type of details about donald machholz can be gathered from the following bio? Bio: donald edward machholz , born october 7 , 1952 in portsmouth , virginia , is an american amateur astronomer who is the most successful living visual comet discoverer in the world . credited with the discovery of 11 comets , that include the periodic comets 96p/machholz , 141p/machholz , the non-periodic c/2004 q2 -lrb- machholz -rrb- that were visible with binoculars in the northern sky in 2004 and 2005 , and most recently , c/2010 f4 -lrb- machholz -rrb- . in 1985 , comet machholz 1985-e , was discovered using a homemade cardboard telescope with a wide aperture , 10 inches across , that gave it a broader field of view than most commercial telescopes . amateur astronomer machholz utilizes a variety of methods in his comet discoveries , in 1986 using 29 130 binoculars he discovered 96p/machholz . machholz is also considered to be one of the inventors of the messier marathon , which is a race to observe all the messier objects in a single night .
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