1822 Waterman
| Discovery [1] | |
|---|---|
| Discovered by | Indiana Asteroid Program |
| Discovery site | Goethe Link Obs. |
| Discovery date | 25 July 1950 |
| Designations | |
| MPC designation | 1822 Waterman |
|
Named after
|
Alan T. Waterman (physicist)[2] |
| 1950 OO · 1943 EB 1953 MA · 1963 TT |
|
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 65.62 yr (23968 days) |
| Aphelion | 2.5030 AU (374.44 Gm) |
| Perihelion | 1.8367 AU (274.77 Gm) |
| 2.1699 AU (324.61 Gm) | |
| Eccentricity | 0.15355 |
| 3.20 yr (1167.5 d) | |
| 219.99° | |
| Inclination | 0.95603° |
| 221.30° | |
| 30.406° | |
| Earth MOID | 0.821252 AU (122.8576 Gm) |
| Jupiter MOID | 2.5244 AU (377.64 Gm) |
| Physical characteristics | |
| Dimensions | 6.515±0.060 km[4] 7.46 km (calculated)[3] |
| 7.581 h (0.3159 d)[1][5] | |
| 0.2639±0.0659[4] 0.20 (assumed)[3] |
|
| S [3] | |
| 13.1 | |
1822 Waterman, provisional designation 1950 OO, is a stony asteroid from the inner regions of the asteroid belt, about 7 kilometers in diameter. It was discovered on July 25, 1950 by the Indiana Asteroid Program at the Goethe Link Observatory in the U.S. state of Indiana.[6]
The asteroid orbits the Sun at a distance of 1.8–2.5 AU once every 3.20 years (1,167 days). It has a rotation period of 7.6 hours.[5] Preliminary results from the NEOWISE mission determined a geometric albedo of 0.26,[4] while the Light Curve Data Base project assumes a lower albedo of 0.20 for the S-type asteroid.[3]
The asteroid was named in honor of American physicist Alan Tower Waterman (1892–1967), who was the first director of the U.S. National Science Foundation. He went to Washington to serve with OSRD (1941–45), ONR (1946–51), and NSF (1951–63), after being an academic physicist for 25 years. He was awarded the Karl Taylor Compton Gold Medal for distinguished statesmanship in science, the Public Welfare Medal and the Presidential Medal of Freedom.[2][7]
References
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External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Geneve, Raoul Behrend
- 1822 Waterman at the JPL Small-Body Database
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