the UK. His major fields of study are solar and double star measurement from his home in Chester. || |-id=413 | 27413 Ambruster || || Carol Ambruster (1943–2013) did pioneering research on magnetic activity and flares of cool stars. She led Chaco Canyon work providing evidence for an early Navajo sun-watching tradition. Carol was the epitome of a perspicuous observer, with consummate interests also in music, art and history, and the natural world (Src). || |-id=417 | 27417 Jessjohnson || || Jess Johnson (born 1966) is an observer as well as instrumentation specialist with the Catalina Sky Survey. || |-id=420 | 27420 Shontobegay || || Shonto Begay (born 1954) is a Navajo artist who lives in Flagstaff, Arizona. He is known for his visual art and writing and illustrating children's books. || |-id=421 | 27421 Nathanhan || || Nathan Han (born 1999) is a finalist in the 2011 Broadcom MASTERS, a math and science competition for middle-school students, for his biochemistry, medicine, health science and microbiology project. || |-id=422 | 27422 Robheckman || || Robert Tanner Heckman (born 1997) is a finalist in the 2011 Broadcom MASTERS, a math and science competition for middle-school students, for his biochemistry, medicine, health science and microbiology project. || |-id=423 | 27423 Dennisbowers || || Dennis Bowers (born 1953), a long-time technician of the University of Arizona's Lunar and Planetary Laboratory, where he provided electronic engineering for spacecraft and ground-based observing instrumentation and up-to-date audio-visual support for classes, conferences, and meetings. || |-id=425 | 27425 Bakker || || Robert T. Bakker (born 1945), an American paleontologist. He was instrumental in developing modern theories about dinosaurs and the warm-blooded behavior of some types of dinosaurs. His book The Dinosaur Heresies (1986) brought these new ideas to the public and lay scientists, and he was a consultant for the movie "Jurassic Park". || |-id=426 | 27426 Brettlawrie || || Brett Lawrie (born 1959), an engineer at the University of Arizona's Lunar and Planetary Laboratory and Steward Observatory. He is instrumental in the design, fabrication and testing of instruments and hardware for large world-class ground-based observatories, analytical laboratories and numerous NASA spacecraft missions. || |-id=431 | 27431 Jimcole || || Jim Cole (born 1951) is a Senior Public Program Educator at Lowell Observatory. He began by giving campus tours and operating telescopes for the public. He now serves as a telescope technician and was a major contributor