Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 271,411 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2021 GM1 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2021 GM1 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.

2021 GM1 orbits the sun every 355 days (0.97 years), coming as close as 0.95 AU and reaching as far as 1.01 AU from the sun. Based on its brightness and the way it reflects light, 2021 GM1 is probably between 0.001 to 0.007 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2021 GM1's orbit is 0.01 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

2021 GM1 has 11 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
May 9, 2020 271,411 1.808
April 2, 2021 406,370 1.518
May 1, 2022 26,595,703 5.763
Feb. 20, 2050 21,520,136 4.795
Nov. 15, 2050 5,637,897 0.862
April 16, 2051 3,952,269 1.364
Nov. 18, 2069 8,332,936 1.177
April 20, 2070 8,949,747 2.379
April 18, 2087 10,088,968 2.643
April 19, 2103 26,683,769 6.021
Feb. 21, 2118 10,071,510 2.720

Images and Observations

2021 GM1's orbit is determined by observations dating back to May 26, 2020. It was last officially observed on May 5, 2021. The IAU Minor Planet Center records 115 observations used to determine its orbit.

Accessibility and Exploration

2021 GM1 can be reached with a journey of 354 days. This trajectory would require a delta-v of 3.389 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 1,864,713 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2021 GM1.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2021 GM1:

References

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Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 0.9811 AU
  • Eccentricity: 0.0271
  • Inclination: 1.16°
  • Longitude of Ascending Node: 178.18°
  • Argument of Periapsis: 220.72°
  • Mean Anomaly: 242.95°

Physical Characteristics

  • Diameter: ~0.004 km
  • Magnitude: 30.4

Derived Characteristics

  • Orbit Period: 355 days (0.97 years)
  • Avg. Orbit Speed: 30.07 km/s
  • Aphelion Distance: 1.01 AU
  • Perihelion Distance: 0.95 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2021 GM1 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.