37655 Illapa

Illapa

Discovery[1]
Discovered by	C. S. Shoemaker and E. M. Shoemaker
Discovery site	Palomar
Discovery date	1 August 1994
Designations
MPC designation	37655
Alternative names	1994 PM
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) (Q)
Perihelion	0.36604 AU (54.759 Gm) (q)
Semi-major axis	1.4780 AU (221.11 Gm) (a)
Eccentricity	0.75235 (e)
Orbital period	1.80 yr (656.34 d)
Mean anomaly	299.48° (M)
Mean motion	0° 32^m 54.564^s / day (n)
Inclination	18.002° (i)
Longitude of ascending node	139.70° (Ω)
Argument of perihelion	303.72° (ω)
Earth MOID	0.0235523 AU (3.52337 Gm)
Jupiter MOID	2.83172 AU (423.619 Gm)
Jupiter Tisserand parameter	4.188
Physical characteristics
Dimensions	0.8 - 1.8 km[2]
Rotation period	2.6556 h (0.11065 d)
Sidereal rotation period	2.6556 hr[1]
Spectral type	C[3]
Absolute magnitude (H)	17.9[1]

37655 Illapa (1994 PM) is an Apollo asteroid discovered on August 1, 1994 by C. S. Shoemaker and E. M. Shoemaker at Palomar.^[1]

Illapa has an estimated diameter of 0.8 to 1.8 km.^[2] On 2003-Aug-16 Illapa made of close approach to Earth of 0.025037 AU (3,745,500 km; 2,327,300 mi).^[4]

Illapa is named for the thunder or weather god of the Incas.

References

1. "JPL Small-Body Database Browser: 37655 Illapa (1994 PM)". Jet Propulsion Laboratory. Retrieved 12 April 2016.
2. "( 37655) Illapa". The Near-Earth Asteroids Data Base at E.A.R.N. Retrieved 2012-06-21.
3. "Near-Earth Asteroid Surface Roughness Depends on Compositional Class". NASA/JPL Asteroid Radar Research. July 17, 2012. Retrieved 2012-07-23.
4. "JPL Close-Approach Data: 37655 Illapa (1994 PM)". Retrieved 2012-06-21.

External links

• 37655 Illapa at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters