2015 HM1

Very small Apollo-class Asteroid

Near-Earth
Space Reference » Apollo-class Asteroids » 2015 HM1

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 5,526,571 km of Earth in 2024
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2015 HM1 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2015 HM1 as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.

2015 HM1 orbits the sun every 413 days (1.13 years), coming as close as 0.89 AU and reaching as far as 1.28 AU from the sun. Based on its brightness and the way it reflects light, 2015 HM1 is probably between 0.024 to 0.054 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2015 HM1's orbit is 0.01 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 HM1 has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Oct. 24, 2024 5,526,571 10.877
May 1, 2032 24,317,728 13.068
April 27, 2041 21,544,154 9.973
Oct. 22, 2050 11,823,311 10.436
Nov. 3, 2059 22,476,893 14.060
May 1, 2067 15,536,574 10.616
Oct. 28, 2085 6,964,253 12.059
May 2, 2093 15,632,737 11.247
Oct. 25, 2154 7,022,128 10.761
May 3, 2162 26,380,859 13.389

Images and Observations

2015 HM1's orbit is determined by observations dating back to April 18, 2015. It was last officially observed on April 28, 2015. The IAU Minor Planet Center records 23 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 HM1:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.086 AU
  • Eccentricity: 0.1824
  • Inclination: 18.74°
  • Longitude of Ascending Node: 211.98°
  • Argument of Periapsis: 112.02°
  • Mean Anomaly: 55.82°

Physical Characteristics

  • Diameter: ~0.031 km
  • Magnitude: 25.2

Derived Characteristics

  • Orbit Period: 413 days (1.13 years)
  • Avg. Orbit Speed: 28.61 km/s
  • Aphelion Distance: 1.28 AU
  • Perihelion Distance: 0.89 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2015 HM1 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 HM1 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.