Tomaiyowit

11500 Tomaiyowit (1989 UR)

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » Tomaiyowit

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge (0.74 km diameter)
  • Will pass within 27,979,244 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

Tomaiyowit is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Tomaiyowit as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

Tomaiyowit orbits the sun every 410 days (1.12 years), coming as close as 0.70 AU and reaching as far as 1.46 AU from the sun. Tomaiyowit is about 0.7 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, comparable in size to the Golden Gate Bridge.

The rotation of Tomaiyowit has been observed. It completes a rotation on its axis every 73.00 hours.

Tomaiyowit's spectral type None (Tholen) / S (SMASSII) indicates that it is likely to contain and .

Close Approaches

Tomaiyowit's orbit is 0.03 AU from Earth's orbit at its closest point. This means that there is a wide berth between this asteroid and Earth at all times.

Tomaiyowit has 20 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 21, 2019 27,979,244 16.208
June 11, 2028 13,288,754 12.373
May 30, 2037 19,793,556 9.372
Nov. 28, 2044 20,093,178 8.553
Nov. 26, 2053 5,256,753 11.676
Nov. 21, 2062 21,446,917 15.658
June 17, 2074 19,651,780 14.339
June 8, 2083 13,511,877 10.974
May 23, 2092 24,829,531 8.855
Nov. 29, 2099 15,625,250 9.256
Nov. 27, 2108 6,347,329 12.380
Nov. 21, 2117 27,797,706 16.907
June 13, 2129 13,356,523 12.216
May 28, 2138 22,820,973 9.009
Nov. 30, 2145 14,417,373 9.463
Nov. 26, 2154 9,968,893 13.279
June 20, 2166 22,534,798 14.958
June 7, 2175 15,320,705 10.379
Nov. 29, 2182 22,401,527 8.265
Nov. 27, 2191 7,624,787 12.677

Images and Observations

Tomaiyowit's orbit is determined by observations dating back to Oct. 25, 1989. It was last officially observed on Aug. 18, 2019. The IAU Minor Planet Center records 1,243 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 Tomaiyowit:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.08 AU
  • Eccentricity: 0.3558
  • Inclination: 10.31°
  • Longitude of Ascending Node: 234.39°
  • Argument of Periapsis: 289.53°
  • Mean Anomaly: 332.26°

Physical Characteristics

  • Diameter: 0.73800 km
  • Magnitude: 18.37
  • Albedo: 0.142
  • Spectral type (SMASS): S

Derived Characteristics

  • Orbit Period: 410 days (1.12 years)
  • Avg. Orbit Speed: 28.66 km/s
  • Aphelion Distance: 1.46 AU
  • Perihelion Distance: 0.70 AU
  • Rotation Period: 73.00 hours
  • Approx. Composition: and .

Map Comparison

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Orbit Simulation

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Sky Map

The position of Tomaiyowit 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.

Size Rendering

The above comparison is an artistic rendering that uses available data on the diameter of Tomaiyowit to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.