2021 JY

Small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 2021 JY

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 28,920,082 km of Earth in 2025
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2021 JY is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2021 JY as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2021 JY orbits the sun every 736 days (2.02 years), coming as close as 0.68 AU and reaching as far as 2.51 AU from the sun. Based on its brightness and the way it reflects light, 2021 JY is probably between 0.464 to 1.038 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

Close Approaches

2021 JY's orbit is 0.04 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.

2021 JY has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
April 23, 2025 28,920,082 21.596
April 26, 2027 22,305,848 23.235
April 28, 2029 23,025,429 25.045
Oct. 28, 2133 24,345,965 28.316
Nov. 2, 2135 11,665,120 26.385
Nov. 6, 2137 6,138,817 24.701
Nov. 11, 2139 17,207,665 23.051
April 25, 2160 23,298,443 22.563
April 28, 2162 20,555,451 24.285
May 1, 2164 25,794,578 26.262

Images and Observations

2021 JY's orbit is determined by observations dating back to Sept. 27, 2016. It was last officially observed on May 12, 2023. The IAU Minor Planet Center records 113 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 2021 JY:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.595 AU
  • Eccentricity: 0.5764
  • Inclination: 36.16°
  • Longitude of Ascending Node: 44.51°
  • Argument of Periapsis: 76.6°
  • Mean Anomaly: 103.98°

Physical Characteristics

  • Diameter: ~0.599 km
  • Magnitude: 18.79

Derived Characteristics

  • Orbit Period: 736 days (2.02 years)
  • Avg. Orbit Speed: 23.58 km/s
  • Aphelion Distance: 2.51 AU
  • Perihelion Distance: 0.68 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2021 JY 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 2021 JY 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.