2011 YJ28

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 2011 YJ28

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a football field
  • Will pass within 20,840,395 km of Earth in 2024
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2011 YJ28 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2011 YJ28 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2011 YJ28 orbits the sun every 398 days (1.09 years), coming as close as 0.96 AU and reaching as far as 1.16 AU from the sun. Based on its brightness and the way it reflects light, 2011 YJ28 is probably between 0.146 to 0.327 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

Close Approaches

2011 YJ28'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.

2011 YJ28 has 18 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 14, 2024 20,840,395 14.312
July 6, 2024 20,045,161 14.174
Jan. 15, 2036 21,990,204 14.428
July 5, 2036 22,868,336 14.245
Jan. 15, 2048 25,129,758 14.736
July 3, 2048 28,769,215 14.472
July 21, 2085 26,124,239 15.891
July 18, 2097 18,710,801 15.268
Jan. 10, 2109 28,171,717 13.834
July 18, 2109 14,708,842 14.972
Jan. 10, 2121 28,455,377 13.835
July 18, 2121 15,275,022 15.019
July 20, 2133 20,240,376 15.380
July 23, 2145 28,254,676 16.092
Jan. 17, 2180 25,476,176 14.732
July 5, 2180 28,230,437 14.452
Jan. 16, 2192 22,279,279 14.435
July 6, 2192 22,502,363 14.249

Images and Observations

2011 YJ28's orbit is determined by observations dating back to Dec. 27, 2011. It was last officially observed on Jan. 30, 2012. The IAU Minor Planet Center records 99 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 2011 YJ28:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.06 AU
  • Eccentricity: 0.0925
  • Inclination: 27.07°
  • Longitude of Ascending Node: 290.1°
  • Argument of Periapsis: 306.03°
  • Mean Anomaly: 138.89°

Physical Characteristics

  • Diameter: ~0.189 km
  • Magnitude: 21.3

Derived Characteristics

  • Orbit Period: 398 days (1.09 years)
  • Avg. Orbit Speed: 28.97 km/s
  • Aphelion Distance: 1.16 AU
  • Perihelion Distance: 0.96 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2011 YJ28 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 2011 YJ28 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.