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1625 The NORC
1625 The NORC, provisional designation 1953 RB, is a dark, carbonaceous asteroid from the outer region of the asteroid belt, about 48 kilometers in diameter. It was discovered by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle on 1 September 1953.〔
The minor planet orbits the Sun at a distance of 2.5–3.9 AU once every 5.70 years (2,082 days). Its orbit shows an eccentricity of 0.23 and is tilted by 16 degrees to the plane of the ecliptic. Measurements of its rotation gave a period of 13–14 hours〔〔〔 and an additional, alternative result from the ''Intermediate Palomar Transient Factory'' (iPTF) of hours.〔
The C-type asteroid's albedo lies between 0.02 and 0.07, according to the surveys carried out by Akari and WISE/NEOWISE.〔〔〔 Correspondingly, the body's size estimate strongly varies between 45 kilometers (AKARI, albedo of 0.065) and 75 kilometer (NEOWISE, albedo of 0.023).
It was named after, NORC, IBM's first-generation vacuum tube computer built in the 1950s ''(also see List of vacuum tube computers)''. NORC, or ''Naval Ordnance Research Calculator'', was the fastest, most powerful electronic computer of its time. Under the direction of Wallace J. Eckert, after whom the asteroid 1750 Eckert is named, NORC performed a vast amount of orbital calculations for minor planet.〔
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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