37655 Illapa

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Illapa
Discovery [1]
Discovered by C. S. Shoemaker
E. M. Shoemaker
Discovery site Palomar Obs.
Discovery date1 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
Mean diameter
0.792–1.772 km (est.) [2]
1.5 km (generic at 0.057)
2.6556  h [1]
C [3]
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]

    Contents

    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]

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    References

    1. 1 2 3 4 5 6 7 8 9 10 "JPL Small-Body Database Browser: 37655 Illapa (1994 PM)". Jet Propulsion Laboratory . Retrieved 12 April 2016.
    2. 1 2 "( 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.
    3. "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.
    4. "JPL Close-Approach Data: 37655 Illapa (1994 PM)" . Retrieved 21 June 2012.