154555 (2003 HA)

Mid-sized Apollo-class Asteroid

Near-Earth
Space Reference » Apollo-class Asteroids » 154555 (2003 HA)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to Mount Everest
  • Will pass within 23,878,513 km of Earth in 2047
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

154555 (2003 HA) is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2003 HA 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.

2003 HA orbits the sun every 471 days (1.29 years), coming as close as 0.50 AU and reaching as far as 1.87 AU from the sun. Based on its brightness and the way it reflects light, 2003 HA is probably between 1.215 to 2.717 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

The rotation of 2003 HA has been observed. It completes a rotation on its axis every 5.18 hours.

Close Approaches

2003 HA's orbit is 0.12 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.

2003 HA has 8 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
May 2, 2047 23,878,513 29.010
May 7, 2056 17,347,028 26.136
May 14, 2065 27,638,079 23.472
Nov. 28, 2066 29,286,458 27.589
May 4, 2105 21,528,457 28.489
May 11, 2114 18,365,587 25.407
May 6, 2163 18,528,958 27.646
May 12, 2172 20,031,711 24.853

Images and Observations

2003 HA's orbit is determined by observations dating back to March 7, 2003. It was last officially observed on Feb. 19, 2023. The IAU Minor Planet Center records 1,093 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 2003 HA:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.184 AU
  • Eccentricity: 0.5803
  • Inclination: 36.83°
  • Longitude of Ascending Node: 53.48°
  • Argument of Periapsis: 277.15°
  • Mean Anomaly: 202.85°

Physical Characteristics

  • Diameter: ~1.568 km
  • Magnitude: 16.7

Derived Characteristics

  • Orbit Period: 471 days (1.29 years)
  • Avg. Orbit Speed: 27.35 km/s
  • Aphelion Distance: 1.87 AU
  • Perihelion Distance: 0.50 AU
  • Rotation Period: 5.18 hours

Map Comparison

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Orbit Simulation

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Sky Map

The position of 154555 (2003 HA) 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 2003 HA 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.