1625 The NORC
| Discovery [1] | |
|---|---|
| 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)[2] |
| 1953 RB · 1929 CA 1935 EN · 1936 QS 1942 RK · 1947 NG 1953 QK · 1954 UL1 A914 SA |
|
| main-belt · (outer) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 100.75 yr (36,798 days) |
| Aphelion | 3.9208 AU |
| Perihelion | 2.4610 AU |
| 3.1909 AU | |
| Eccentricity | 0.2287 |
| 5.70 yr (2,082 days) | |
| 9.6865° | |
| Inclination | 15.555° |
| 320.79° | |
| 286.12° | |
| Physical characteristics | |
| Dimensions | 44.66±2.09 km[4] 55.863±1.536 km[5] 75.11±0.80 km[6] 47.60 km (calculated)[3] |
| 13.959 h[7] 12.94±0.01 h[8] 13.8113±0.0071 h[9] 18.820±0.770 h[10] |
|
| 0.065±0.006[4] 0.0414±0.0077[5] 0.023±0.004[6] 0.057 (assumed)[3] |
|
| B–V = 0.732 U–B = 0.311 Tholen = C C [3] |
|
| 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.[11]
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[7][8][9] and an additional, alternative result from the Intermediate Palomar Transient Factory (iPTF) of 18.820±0.770 hours.[10]
The C-type asteroid's albedo lies between 0.02 and 0.07, according to the surveys carried out by Akari and WISE/NEOWISE.[4][5][6] 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.[2]
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 6.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 9.0 9.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 10.0 10.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- About NORC: Smartest Brain Joins The Navy (1954) on YouTube (time 0:45 min.)
- Intermediate Palomar Transient Factory – home
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1625 The NORC at the JPL Small-Body Database
