2008 HH

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 2008 HH

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a basketball court
  • Will pass within 24,712,050 km of Earth in 2051
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2008 HH is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2008 HH as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2008 HH orbits the sun every 583 days (1.60 years), coming as close as 0.88 AU and reaching as far as 1.85 AU from the sun. Based on its brightness and the way it reflects light, 2008 HH is probably between 0.111 to 0.248 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a basketball court.

Close Approaches

2008 HH's orbit is 0.02 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.

2008 HH has 9 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Oct. 16, 2051 24,712,050 16.536
Oct. 11, 2059 12,460,398 14.509
Oct. 9, 2067 5,824,755 13.412
Oct. 10, 2075 8,772,187 13.912
Oct. 14, 2083 19,254,250 15.616
Sept. 27, 2168 20,325,360 10.308
Oct. 2, 2176 11,472,691 11.263
Oct. 4, 2184 7,449,939 11.785
Oct. 3, 2192 10,213,312 11.419

Images and Observations

2008 HH's orbit is determined by observations dating back to April 24, 2008. It was last officially observed on Nov. 22, 2016. The IAU Minor Planet Center records 55 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 2008 HH:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.366 AU
  • Eccentricity: 0.3555
  • Inclination: 16.32°
  • Longitude of Ascending Node: 196.66°
  • Argument of Periapsis: 116.02°
  • Mean Anomaly: 175.45°

Physical Characteristics

  • Diameter: ~0.143 km
  • Magnitude: 21.9

Derived Characteristics

  • Orbit Period: 583 days (1.60 years)
  • Avg. Orbit Speed: 25.49 km/s
  • Aphelion Distance: 1.85 AU
  • Perihelion Distance: 0.88 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2008 HH 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 below comparison is an artistic rendering that uses available data on the diameter of 2008 HH to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.