12838 Adamsmith
| Discovery | |
|---|---|
| Discovered by | E. W. Elst |
| Discovery site | La Silla Obs. |
| Discovery date | 9 March 1997 |
| Designations | |
| MPC designation | 12838 Adamsmith |
|
Named after
|
Adam Smith (moral philosopher) |
|
1997 EL55 · 1987 DX6 1997 HO14 · 1999 RX2 |
|
| main-belt · Koronis | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 29.27 yr (10,690 days) |
| Aphelion | 3.0761 AU |
| Perihelion | 2.6968 AU |
| 2.8864 AU | |
| Eccentricity | 0.0657 |
| 4.90 yr (1,791 days) | |
| 154.57° | |
| 0° 12m 3.6s / day | |
| Inclination | 1.1634° |
| 322.17° | |
| 89.559° | |
| Physical characteristics | |
| Dimensions | 6.16 km (calculated) |
| 10.9090±0.0031 h | |
| 0.24 (assumed) | |
| S | |
| 13.0 · 12.70±0.34 · 12.770±0.002 (R) · 13.22 | |
12838 Adamsmith, provisional designation 1997 EL55, is a stony Koronis asteroid from the outer region of the asteroid belt, about 6 kilometers in diameter. It was discovered by Belgian astronomer Eric Walter Elst at ESO's La Silla Observatory in northern Chile, on 9 March 1997.
The S-type asteroid is a member of the Koronis family, a group consisting of about 200 known bodies. It orbits the Sun at a distance of 2.7–3.1 AU once every 4 years and 11 months (1,791 days). Its orbit has an eccentricity of 0.07 and an inclination of 1° with respect to the ecliptic. The first precovery was taken at the discovering observatory in 1987, extending the asteroid's observation arc by 10 years prior to its discovery.
A rotational light-curve was obtained from photometric observation made at the U.S. Palomar Transient Factory, California, in January 2011. It shows a rotation period of 10.9090±0.0031 hours with a brightness amplitude of 0.48 in magnitude (U=2). The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.24 and calculates a diameter of 6.2 kilometers.
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