5-607: PCAS may refer to: Palomar Planet-Crossing Asteroid Survey , astronomical survey Patient-controlled analgesia methods Persistent Close Air Support Personal Carbon Allowances, a concept in Personal carbon trading Polytechnics Central Admissions System Portable Collision Avoidance System Postgraduate Certificate in Antarctic Studies at University of Canterbury Post-Cardiac Arrest Syndrome Topics referred to by
10-469: Is different from Wikidata All article disambiguation pages All disambiguation pages Palomar Planet-Crossing Asteroid Survey The Palomar Planet-Crossing Asteroid Survey ( PCAS ) was an astronomical survey , initiated by American astronomers Eleanor Helin and Eugene Shoemaker at the U.S Palomar Observatory , California, in 1973. The program is responsible for the discovery of 95 near-Earth Objects including 17 comets , while
15-479: The Minor Planet Center directly credits PCAS with the discovery of 20 numbered minor planets during 1993–1994. PCAS ran for nearly 25 years until June 1995. It had an international extension, INAS , and was the immediate predecessor of the outstandingly successful NEAT program . The first NEO discovered by PACS was (5496) 1973 NA , an Apollo asteroid with an exceptional orbital inclination of 68 ° ,
20-500: The most highly inclined minor planet known until 1999. In 1976, Eleanor Helin discovered 2062 Aten , the first of a new class of asteroids called the Aten asteroids with small orbits that are never far from Earth's orbit. As a result, these objects have a particularly high probability of colliding with the Earth . In 1979, Helin discovered an Apollo-type asteroid, that they later identified with
25-405: The same term [REDACTED] This disambiguation page lists articles associated with the title PCAS . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=PCAS&oldid=1084965260 " Category : Disambiguation pages Hidden categories: Short description
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