| Discovery | |
|---|---|
| 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) |
| 1994 PM | |
| NEO · Apollo · PHA | |
| Orbital characteristics | |
| 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.) 1.5 km (generic at 0.057) | |
| 2.6556 h | |
| C | |
| 17.9 | |
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.
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).
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. For an assumed albedo of 0.057, which is typical for carbonaceous C-type asteroids, and an absolute magnitude of 17.9, the asteroid has a calculated mean diameter of 1.5 kilometers. The body has a short rotation period of 2.6556 hours.
Naming
This minor planet was named after Illapa (Apu Illapu), the thunder or weather god from Inca mythology.
References
- ^ a b c d e f g h i j "JPL Small-Body Database Browser: 37655 Illapa (1994 PM)". Jet Propulsion Laboratory. Retrieved 12 April 2016.
- ^ a b "( 37655) Illapa". The Near-Earth Asteroids Data Base at E.A.R.N. Archived from the original on 31 May 2012. Retrieved 21 June 2012.
- ^ "Near-Earth Asteroid Surface Roughness Depends on Compositional Class". NASA/JPL Asteroid Radar Research. 17 July 2012. Archived from the original on 16 October 2011. Retrieved 23 July 2012.
- ^ "JPL Close-Approach Data: 37655 Illapa (1994 PM)". Retrieved 21 June 2012.
External links
- 37655 Illapa at NeoDyS-2, Near Earth Objects—Dynamic Site
- 37655 Illapa at ESA–space situational awareness
- 37655 Illapa at the JPL Small-Body Database