Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a football field (0.29 km diameter)
  • Will pass within 7,028,518 km of Earth in 2025
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

390725 (2003 HB) is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2003 HB as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2003 HB orbits the sun every 286 days (0.78 years), coming as close as 0.53 AU and reaching as far as 1.17 AU from the sun. 2003 HB is about 0.3 kilometers in diameter, making it a small to average asteroid, comparable in size to a football field.

Close Approaches

2003 HB's orbit is 0.05 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.

2003 HB has 17 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
May 25, 2025 7,028,518 13.466
May 18, 2036 29,830,450 18.754
May 27, 2043 14,578,911 11.810
May 22, 2054 17,462,548 16.371
May 23, 2061 26,615,520 10.484
May 24, 2072 7,215,001 14.075
May 26, 2090 11,751,607 12.240
May 23, 2101 17,914,877 16.476
May 24, 2108 27,870,804 10.395
May 27, 2119 6,677,465 13.508
May 21, 2130 27,338,795 18.260
May 27, 2137 18,147,171 11.316
May 24, 2148 12,702,915 15.447
May 27, 2166 6,633,133 13.448
May 21, 2177 28,366,167 18.471
May 27, 2184 17,229,083 11.424
May 25, 2195 11,770,112 15.278

Images and Observations

2003 HB's orbit is determined by observations dating back to April 21, 2003. It was last officially observed on May 16, 2021. The IAU Minor Planet Center records 275 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 HB:

References

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Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 0.8496 AU
  • Eccentricity: 0.3805
  • Inclination: 18.11°
  • Longitude of Ascending Node: 70.37°
  • Argument of Periapsis: 306.75°
  • Mean Anomaly: 272.18°

Physical Characteristics

  • Diameter: 0.29300 km
  • Magnitude: 19.69
  • Albedo: 0.271

Derived Characteristics

  • Orbit Period: 286 days (0.78 years)
  • Avg. Orbit Speed: 32.32 km/s
  • Aphelion Distance: 1.17 AU
  • Perihelion Distance: 0.53 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 390725 (2003 HB) 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 2003 HB 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.