1625 The NORC
| Discovery | |
|---|---|
| Discovered by | S. Arend |
| Discovery site | Uccle – Belgium |
| Discovery date | 1 September 1953 |
| Designations | |
| MPC designation | 1625 The NORC |
|
Named after
|
The IBM NORC (Naval Ordnance Research Calculator) |
| 1953 RB · 1929 CA 1935 EN · 1936 QS 1942 RK · 1947 NG 1953 QK · 1954 UL1 A914 SA |
|
| main-belt · (outer) | |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 100.75 yr (36798 days) |
| Aphelion | 3.9219 AU (586.71 Gm) |
| Perihelion | 2.4611 AU (368.18 Gm) |
| 3.1915 AU (477.44 Gm) | |
| Eccentricity | 0.22886 |
| 5.70 yr (2082.5 d) | |
| 44.249° | |
| 0° 10m 22.332s / day | |
| Inclination | 15.556° |
| 320.80° | |
| 286.13° | |
| Earth MOID | 1.50113 AU (224.566 Gm) |
| Jupiter MOID | 1.60896 AU (240.697 Gm) |
| Jupiter Tisserand parameter | 3.099 |
| Physical characteristics | |
| Dimensions |
44.66±2.09 km 55.863±1.536 km 75.11±0.80 km 47.60 km (calculated) |
| 13.959 h (0.5816 d) 12.94±0.01 h 13.8113±0.0071 h 18.820±0.770 h |
|
|
0.065±0.006 0.0414±0.0077 0.023±0.004 0.057 (assumed) |
|
|
B–V = 0.732 U–B = 0.311 Tholen = C C |
|
| 10.34 | |
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 18.820±0.770 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.
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