Astronomy:37655 Illapa
| 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 | |
| Minor planet category | NEO · Apollo · PHA [1] |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 7645 days (20.93 yr) |
| |{{{apsis}}}|helion}} | 2.5901 astronomical unit|AU (387.47 Gm) |
| |{{{apsis}}}|helion}} | 0.36604 AU (54.759 Gm) |
| 1.4780 AU (221.11 Gm) | |
| Eccentricity | 0.75235 |
| Orbital period | 1.80 yr (656.34 d) |
| Mean anomaly | 299.48° |
| Mean motion | 0° 32m 54.564s / day |
| Inclination | 18.002° |
| Longitude of ascending node | 139.70° |
| 303.72° | |
| Earth MOID | 0.0235523 AU (3.52337 Gm) |
| Physical characteristics | |
| Mean diameter | 0.792–1.772 km (est.)[2] 1.5 km (generic at 0.057) |
| Rotation period | 2.6556 h[1] |
| C [3] | |
| Absolute magnitude (H) | 17.9[1] |
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]
Orbit and classification
On 16 August 2003, Illapa made a close approach to Earth of 0.025037 astronomical unit|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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 "JPL Small-Body Database Browser: 37655 Illapa (1994 PM)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=37655.
- ↑ 2.0 2.1 "( 37655) Illapa". The Near-Earth Asteroids Data Base at E.A.R.N. http://earn.dlr.de/nea/037655.htm.
- ↑ "Near-Earth Asteroid Surface Roughness Depends on Compositional Class". NASA/JPL Asteroid Radar Research. July 17, 2012. http://echo.jpl.nasa.gov/~lance/scoc/scoc.html.
- ↑ "JPL Close-Approach Data: 37655 Illapa (1994 PM)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=37655;cad=1#cad.
External links
- 37655 Illapa at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 37655 Illapa at ESA–space situational awareness
- 37655 Illapa at the JPL Small-Body Database
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