2009 JR

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 2009 JR

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a football field
  • Will pass within 20,426,890 km of Earth in 2025
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2009 JR is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2009 JR as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2009 JR orbits the sun every 831 days (2.28 years), coming as close as 0.88 AU and reaching as far as 2.58 AU from the sun. Based on its brightness and the way it reflects light, 2009 JR is probably between 0.139 to 0.312 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

Close Approaches

2009 JR's orbit is 0.03 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.

2009 JR has 9 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 14, 2025 20,426,890 9.793
Feb. 28, 2050 24,734,868 8.946
April 19, 2075 8,648,108 10.153
April 20, 2100 7,834,900 10.325
March 20, 2125 22,109,923 8.931
Jan. 22, 2150 21,954,384 9.091
May 6, 2159 18,106,231 14.750
Jan. 6, 2175 23,173,162 12.870
April 28, 2184 5,091,030 12.067

Images and Observations

2009 JR's orbit is determined by observations dating back to May 3, 2009. It was last officially observed on April 6, 2016. The IAU Minor Planet Center records 107 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 2009 JR:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.73 AU
  • Eccentricity: 0.4898
  • Inclination: 8.41°
  • Longitude of Ascending Node: 225.36°
  • Argument of Periapsis: 295.25°
  • Mean Anomaly: 132.44°

Physical Characteristics

  • Diameter: ~0.180 km
  • Magnitude: 21.4

Derived Characteristics

  • Orbit Period: 831 days (2.28 years)
  • Avg. Orbit Speed: 22.65 km/s
  • Aphelion Distance: 2.58 AU
  • Perihelion Distance: 0.88 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2009 JR 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 2009 JR 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.