4544 Xanthus
Encyclopedia
4544 Xanthus is an Apollo NEO
discovered on March 31, 1989 by Henry Holt
and Norman G. Thomas
at Palomar Observatory
.
Near-Earth object
A near-Earth object is a Solar System object whose orbit brings it into close proximity with the Earth. All NEOs have a perihelion distance less than 1.3 AU. They include a few thousand near-Earth asteroids , near-Earth comets, a number of solar-orbiting spacecraft, and meteoroids large enough to...
discovered on March 31, 1989 by Henry Holt
Henry E. Holt
Henry E. Holt is an American astronomer.He has discovered numerous asteroids. He is also a co-discoverer of periodic comets 121P/Shoemaker-Holt, 127P/Holt-Olmstead and 128P/Shoemaker-Holt....
and Norman G. Thomas
Norman G. Thomas
Norman G. Thomas is an American astronomer.He worked at Lowell Observatory using the blink comparator alongside Robert Burnham, Jr., author of the famous three-volume Celestial Handbook....
at Palomar Observatory
Palomar Observatory
Palomar Observatory is a privately owned observatory located in San Diego County, California, southeast of Pasadena's Mount Wilson Observatory, in the Palomar Mountain Range. At approximately elevation, it is owned and operated by the California Institute of Technology...
.