Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 26,553,123 km of Earth in 2099
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

YORP is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified YORP as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.

YORP orbits the sun every 365 days (1.00 years), coming as close as 0.77 AU and reaching as far as 1.23 AU from the sun. Based on its brightness and the way it reflects light, YORP is probably between 0.077 to 0.171 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

The rotation of YORP has been observed. It completes a rotation on its axis every 0.20 days.

Close Approaches

YORP's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

YORP has 24 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Dec. 25, 2099 26,553,123 12.398
Dec. 28, 2100 18,798,865 10.833
Dec. 30, 2101 11,529,547 9.336
Jan. 1, 2103 5,024,864 8.046
Jan. 2, 2104 789,984 7.230
Dec. 30, 2104 10,671,146 9.172
Dec. 27, 2105 21,660,218 11.425
Aug. 9, 2169 21,921,183 11.307
Aug. 6, 2170 11,557,652 9.229
Aug. 4, 2171 2,811,444 7.347
Aug. 2, 2172 6,057,715 5.929
Aug. 5, 2173 14,072,056 4.417
Aug. 24, 2174 21,563,576 4.511
June 11, 2175 28,207,725 5.706
Sept. 9, 2175 26,795,550 5.197
Nov. 28, 2182 26,192,658 5.309
Feb. 24, 2183 27,922,776 5.796
Dec. 15, 2183 20,324,729 4.589
Jan. 30, 2184 21,891,735 3.859
Jan. 1, 2185 11,731,729 4.748
Jan. 2, 2186 3,099,862 6.401
Jan. 2, 2187 2,611,239 7.558
Dec. 31, 2187 12,608,939 9.566
Dec. 27, 2188 23,392,393 11.758

Images and Observations

YORP's orbit is determined by observations dating back to Aug. 3, 2000. It was last officially observed on Aug. 3, 2005. The IAU Minor Planet Center records 550 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of YORP:

References

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Orbital Elements

  • Epoch: 2452656.5 JD
  • Semi-major axis: 1.0 AU
  • Eccentricity: 0.2299
  • Inclination: 1.83°
  • Longitude of Ascending Node: 281.89°
  • Argument of Periapsis: 274.1°
  • Mean Anomaly: 253.03°

Physical Characteristics

  • Diameter: ~0.099 km
  • Magnitude: 22.7

Derived Characteristics

  • Orbit Period: 365 days (1.00 years)
  • Avg. Orbit Speed: 29.81 km/s
  • Aphelion Distance: 1.23 AU
  • Perihelion Distance: 0.77 AU
  • Rotation Period: 0.20 days

Size Comparison

Orbit Simulation

Sky Map

The position of YORP is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.