2015 HR11

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 2015 HR11

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a football field
  • Will pass within 26,601,610 km of Earth in 2026
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2015 HR11 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2015 HR11 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2015 HR11 orbits the sun every 489 days (1.34 years), coming as close as 1.01 AU and reaching as far as 1.42 AU from the sun. Based on its brightness and the way it reflects light, 2015 HR11 is probably between 0.175 to 0.391 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

Close Approaches

2015 HR11'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.

2015 HR11 has 12 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Oct. 17, 2026 26,601,610 17.766
Oct. 20, 2030 15,132,913 17.138
Oct. 23, 2034 5,592,360 16.802
Oct. 25, 2038 3,949,043 16.705
Oct. 27, 2042 13,110,690 16.748
Oct. 30, 2046 24,900,603 17.100
Oct. 19, 2121 22,829,267 17.537
Oct. 22, 2125 11,264,363 16.983
Oct. 25, 2129 3,282,634 16.736
Oct. 27, 2133 7,754,559 16.688
Oct. 30, 2137 17,985,262 16.838
Nov. 1, 2141 29,627,313 17.296

Images and Observations

2015 HR11's orbit is determined by observations dating back to March 29, 2015. It was last officially observed on April 25, 2023. The IAU Minor Planet Center records 70 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 2015 HR11:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.214 AU
  • Eccentricity: 0.1693
  • Inclination: 31.16°
  • Longitude of Ascending Node: 210.69°
  • Argument of Periapsis: 198.05°
  • Mean Anomaly: 236.9°

Physical Characteristics

  • Diameter: ~0.226 km
  • Magnitude: 20.91

Derived Characteristics

  • Orbit Period: 489 days (1.34 years)
  • Avg. Orbit Speed: 27.01 km/s
  • Aphelion Distance: 1.42 AU
  • Perihelion Distance: 1.01 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2015 HR11 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 2015 HR11 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.