37655 Illapa
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37655 Illapa (provisional designation 1994 PM) is a carbonaceous asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.5 kilometers in diameter. It was discovered, on 1 August 1994, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California, United States.[1]
| Discovery [1] | |
|---|---|
| Discovered by | C. S. Shoemaker E. M. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 1 August 1994 |
| Designations | |
| (37655) Illapa | |
Named after | Illapa (Inca mythology)[1] |
| 1994 PM | |
| NEO · Apollo · PHA [1] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 7645 days (20.93 yr) |
| Aphelion | 2.5901 AU (387.47 Gm) |
| Perihelion | 0.36604 AU (54.759 Gm) |
| 1.4780 AU (221.11 Gm) | |
| Eccentricity | 0.75235 |
| 1.80 yr (656.34 d) | |
| 299.48° | |
| 0° 32m 54.564s / day | |
| Inclination | 18.002° |
| 139.70° | |
| 303.72° | |
| Earth MOID | 0.0235523 AU (3.52337 Gm) |
| Physical characteristics | |
| 0.792–1.772 km (est.)[2] 1.5 km (generic at 0.057) | |
| 2.6556 h[1] | |
| C [3] | |
| 17.9[1] | |
Orbit and classification
On 16 August 2003, Illapa made a close approach to Earth of 0.025037 AU (3,750,000 km; 2,330,000 mi).[4]
Physical characteristics
Illapa has an estimated diameter of 0.8 to 1.8 kilometers for an assumed geometric albedo between 0.20 and 0.04.[2] For an assumed albedo of 0.057, which is typical for carbonaceous C-type asteroids, and an absolute magnitude of 17.9,[1] the asteroid has a calculated mean diameter of 1.5 kilometers. The body has a short rotation period of 2.6556 hours.[1]
Naming
This minor planet was named after Illapa (Apu Illapu), the thunder or weather god from Inca mythology.[1]
References
External links
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