Charles W. Juels was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 amateur

Amateur

An amateur is generally considered a person attached to a particular pursuit, study, or science, without pay and often without formal training....

 astronomer

Astronomer

An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...

. He was born in New York City, grew up in Cincinnati, Ohio, and graduated from Cincinnati College of Medicine in 1969. Juels was a prolific discoverer of asteroid

Asteroid

Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...

s, one of the top 30 discoverers of minor planets, with 315 to his credit.http://cfa-www.harvard.edu/iau/lists/MPDiscsNum.html He operated out of Fountain Hills Observatory, near Fountain Hills, Arizona.

Juels and Paulo R. Holvorcem

Paulo R. Holvorcem

Paulo R. Holvorcem is a Brazilian amateur astronomer who lives in Campinas, Brazil.He is a prolific discoverer of asteroids. He is credited by the Minor Planet Center with the discovery or co-discovery of about 200 asteroids between 1998 and 2003.Holvorcem with Juels also discovered two comets:...

 won the Harvard-Smithsonian 2003 Comet Award for their joint charge-coupled-device (CCD) electronic-camera discovery of comet

Comet

A comet is an icy small Solar System body that, when close enough to the Sun, displays a visible coma and sometimes also a tail. These phenomena are both due to the effects of solar radiation and the solar wind upon the nucleus of the comet...

 C/2002 Y1 on December 28, 2002.http://www.cfa.harvard.edu/press/archive/pr0316.html

He was a retired Phoenix

Phoenix, Arizona

Phoenix is the capital, and largest city, of the U.S. state of Arizona, as well as the sixth most populated city in the United States. Phoenix is home to 1,445,632 people according to the official 2010 U.S. Census Bureau data...

psychiatrist at the time of his discoveries.