152680 (1998 KJ9)

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 152680 (1998 KJ9)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the U.S. Capitol building
  • Will pass within 10,940,123 km of Earth in 2044
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

152680 (1998 KJ9) is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1998 KJ9 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

1998 KJ9 orbits the sun every 636 days (1.74 years), coming as close as 0.52 AU and reaching as far as 2.37 AU from the sun. Based on its brightness and the way it reflects light, 1998 KJ9 is probably between 0.321 to 0.718 kilometers in diameter, making it larger than 90% of asteroids but tiny compared to large asteroids, very roughly comparable in size to the U.S. Capitol building.

Close Approaches

1998 KJ9'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.

1998 KJ9 has 13 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 5, 2044 10,940,123 23.225
Dec. 27, 2050 14,484,318 18.269
June 14, 2052 22,945,143 17.265
June 6, 2059 12,276,340 22.032
Jan. 3, 2105 4,461,815 21.903
Dec. 30, 2111 12,435,476 18.689
June 18, 2113 25,847,506 16.600
June 10, 2120 12,060,956 19.910
June 5, 2127 15,790,778 23.275
Jan. 9, 2173 21,904,013 25.386
Jan. 2, 2180 4,666,562 20.260
June 20, 2181 29,680,632 15.826
June 7, 2188 10,820,156 21.731

Images and Observations

1998 KJ9's orbit is determined by observations dating back to Jan. 1, 1990. It was last officially observed on Feb. 2, 2023. The IAU Minor Planet Center records 218 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 1998 KJ9:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.448 AU
  • Eccentricity: 0.6398
  • Inclination: 10.93°
  • Longitude of Ascending Node: 98.55°
  • Argument of Periapsis: 260.11°
  • Mean Anomaly: 150.36°

Physical Characteristics

  • Diameter: ~0.414 km
  • Magnitude: 19.59

Derived Characteristics

  • Orbit Period: 636 days (1.74 years)
  • Avg. Orbit Speed: 24.77 km/s
  • Aphelion Distance: 2.37 AU
  • Perihelion Distance: 0.52 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 152680 (1998 KJ9) 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 1998 KJ9 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.