(5131) 1990 BG
Encyclopedia
1990 BG is an Apollo-type near-Earth
minor planet
. It was discovered by Eleanor F. Helin
and Brian P. Roman
at the Palomar Observatory
in San Diego County
, California
, on January 21, 1990.
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...
minor planet
Minor planet
An asteroid group or minor-planet group is a population of minor planets that have a share broadly similar orbits. Members are generally unrelated to each other, unlike in an asteroid family, which often results from the break-up of a single asteroid...
. It was discovered by Eleanor F. Helin
Eleanor F. Helin
Eleanor Francis "Glo" Helin was an American astronomer. She was principal investigator of the Near Earth Asteroid Tracking program of NASA's Jet Propulsion Laboratory. Some sources give her name as Eleanor Kay Helin...
and Brian P. Roman
Brian P. Roman
Brian P. Roman is an American astronomer.He discovered a number of asteroids, and also co-discovered the periodic comets 111P/Helin-Roman-Crockett, 117P/Helin-Roman-Alu and 132P/Helin-Roman-Alu.The asteroid 4575 Broman was named in his honour.- Sources :...
at the 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...
in San Diego County
San Diego County, California
San Diego County is a large county located in the southwestern corner of the US state of California. Hence, San Diego County is also located in the southwestern corner of the 48 contiguous United States. Its county seat and largest city is San Diego. Its population was about 2,813,835 in the 2000...
, California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
, on January 21, 1990.