Key Facts

  • Classified as a Aten-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 26,739,035 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

396593 (2001 HC) is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2001 HC 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.

2001 HC orbits the sun every 299 days (0.82 years), coming as close as 0.44 AU and reaching as far as 1.31 AU from the sun. Based on its brightness and the way it reflects light, 2001 HC is probably between 0.421 to 0.942 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to the Golden Gate Bridge.

Close Approaches

2001 HC's orbit is 0.10 AU from Earth's orbit at its closest point. This means that there is an wide berth between this asteroid and Earth at all times.

2001 HC has 15 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
April 16, 2019 26,739,035 14.738
April 16, 2028 28,197,741 14.643
April 18, 2037 29,789,053 14.572
April 14, 2095 28,233,173 20.900
April 14, 2104 26,168,378 20.429
April 14, 2113 24,278,746 20.022
April 14, 2122 23,042,932 19.748
April 14, 2131 22,749,854 19.673
April 13, 2140 22,629,293 19.652
April 14, 2149 22,350,026 19.607
April 14, 2158 22,358,522 19.593
April 14, 2167 22,837,069 19.718
April 14, 2176 24,155,124 20.043
April 15, 2185 26,162,047 20.492
April 15, 2194 28,503,001 21.014

Images and Observations

2001 HC's orbit is determined by observations dating back to April 16, 2001. It was last officially observed on May 9, 2019. The IAU Minor Planet Center records 274 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 2001 HC:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 0.874558163249 AU
  • Eccentricity: 0.499428341209
  • Inclination: 23.7411471986°
  • Longitude of Ascending Node: 32.6097561641°
  • Argument of Periapsis: 28.1731856794°
  • Mean Anomaly: 120.879548161°

Physical Characteristics

  • Diameter: ~0.544 km
  • Magnitude: 19.0

Derived Characteristics

  • Orbit Period: 299 days (0.82 years)
  • Avg. Orbit Speed: 31.85 km/s
  • Aphelion Distance: 1.31 AU
  • Perihelion Distance: 0.44 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 396593 (2001 HC) 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.