Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a football field (0.30 km diameter)
  • Will pass within 21,548,227 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

Hathor is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified Hathor as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

Hathor orbits the sun every 283 days (0.78 years), coming as close as 0.46 AU and reaching as far as 1.22 AU from the sun. Hathor is about 0.3 kilometers in diameter, making it a small to average asteroid, comparable in size to a football field.

The rotation of Hathor has been observed. It completes a rotation on its axis every 3.35 days.

Hathor's spectral type CSU (Tholen) / Sq (SMASSII) indicates that it is likely to contain magnesium silicate and iron silicate.

Close Approaches

Hathor's orbit is 0.01 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

Hathor has 28 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 13, 2019 21,548,227 10.280
Nov. 1, 2021 24,029,024 10.006
Jan. 17, 2026 15,619,345 13.914
Jan. 13, 2033 29,877,274 18.508
Oct. 23, 2038 17,000,454 16.738
Oct. 21, 2045 3,619,472 12.588
Jan. 13, 2050 21,562,413 10.291
Nov. 2, 2052 25,384,868 9.985
Jan. 16, 2057 17,998,813 15.067
Oct. 25, 2062 27,078,503 18.891
Oct. 21, 2069 981,352 13.202
Jan. 15, 2074 18,978,041 10.877
Oct. 21, 2086 825,231 13.290
Jan. 15, 2091 19,794,939 10.750
Jan. 13, 2098 29,852,430 18.371
Oct. 23, 2103 5,129,795 14.267
Jan. 10, 2108 25,461,848 9.902
Nov. 1, 2110 22,686,175 10.040
Jan. 18, 2115 18,492,587 15.008
Oct. 25, 2120 23,293,443 18.097
Oct. 23, 2127 8,191,202 11.730
Jan. 18, 2132 16,982,900 11.735
Oct. 22, 2144 3,030,493 13.847
Jan. 10, 2149 25,949,010 9.863
Jan. 19, 2156 16,060,920 13.570
Jan. 17, 2187 24,877,441 17.039
Oct. 25, 2192 20,613,975 17.506
Oct. 23, 2199 3,101,744 12.686

Images and Observations

Hathor's orbit is determined by observations dating back to Oct. 25, 1976. It was last officially observed on Oct. 24, 2014. The IAU Minor Planet Center records 189 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 Hathor:

References

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Orbital Elements

  • Epoch: 2453228.5 JD
  • Semi-major axis: 0.843829245538 AU
  • Eccentricity: 0.44988416559
  • Inclination: 5.85459123323°
  • Longitude of Ascending Node: 211.542137075°
  • Argument of Periapsis: 39.9262941666°
  • Mean Anomaly: 42.1044329479°

Physical Characteristics

  • Diameter: 0.30000 km
  • Magnitude: 20.2
  • Spectral type (Tholen): CSU
  • Spectral type (SMASS): Sq

Derived Characteristics

  • Orbit Period: 283 days (0.78 years)
  • Avg. Orbit Speed: 32.42 km/s
  • Aphelion Distance: 1.22 AU
  • Perihelion Distance: 0.46 AU
  • Rotation Period: 3.35 days
  • Approx. Composition: magnesium silicate and iron silicate.

Size Comparison

Orbit Simulation

Sky Map

The position of Hathor 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.