465633 (2009 JR5)

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 465633 (2009 JR5)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the U.S. Capitol building
  • Will pass within 26,769,310 km of Earth in 2036
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

465633 (2009 JR5) is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2009 JR5 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2009 JR5 orbits the sun every 512 days (1.40 years), coming as close as 0.81 AU and reaching as far as 1.69 AU from the sun. Based on its brightness and the way it reflects light, 2009 JR5 is probably between 0.142 to 0.635 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

2009 JR5'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.

2009 JR5 has 17 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 14, 2036 26,769,310 14.375
Sept. 16, 2043 23,771,717 13.734
Sept. 17, 2050 22,185,447 13.396
Sept. 16, 2057 24,626,164 13.916
Sept. 14, 2064 28,556,590 14.719
March 2, 2097 27,729,366 14.844
Feb. 29, 2104 19,194,229 13.139
Feb. 26, 2111 13,387,377 11.934
Feb. 25, 2118 12,102,697 11.683
Feb. 27, 2125 16,010,077 12.473
March 2, 2132 24,333,833 14.169
Sept. 19, 2162 23,728,620 13.693
Sept. 22, 2169 15,413,399 11.846
Sept. 24, 2176 12,211,322 11.034
Sept. 24, 2183 12,943,995 11.215
Sept. 22, 2190 16,960,836 12.226
Sept. 19, 2197 23,345,225 13.610

Images and Observations

2009 JR5's orbit is determined by observations dating back to Aug. 3, 2005. It was last officially observed on June 18, 2023. The IAU Minor Planet Center records 156 observations used to determine its orbit.

Accessibility and Exploration

2009 JR5 can be reached with a journey of 386 days. This trajectory would require a delta-v of 10.853 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 609 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2009 JR5.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2009 JR5:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.252 AU
  • Eccentricity: 0.3514
  • Inclination: 3.95°
  • Longitude of Ascending Node: 128.19°
  • Argument of Periapsis: 309.94°
  • Mean Anomaly: 217.81°

Physical Characteristics

  • Diameter: ~0.389 km
  • Magnitude: 20.44

Derived Characteristics

  • Orbit Period: 512 days (1.40 years)
  • Avg. Orbit Speed: 26.60 km/s
  • Aphelion Distance: 1.69 AU
  • Perihelion Distance: 0.81 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 465633 (2009 JR5) 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 JR5 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.