Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 12,298,554 km of Earth in 2023
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2009 DO111 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2009 DO111 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.

2009 DO111 orbits the sun every 394 days (1.08 years), coming as close as 0.76 AU and reaching as far as 1.35 AU from the sun. Based on its brightness and the way it reflects light, 2009 DO111 is probably between 0.047 to 0.209 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

The rotation of 2009 DO111 has been observed. It completes a rotation on its axis every 0.05 hours.

Close Approaches

2009 DO111's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

2009 DO111 has 27 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
March 17, 2023 12,298,554 11.557
Sept. 27, 2025 18,849,959 5.473
March 22, 2037 7,398,101 7.670
Oct. 7, 2039 5,977,726 10.271
March 18, 2050 9,607,544 11.046
Oct. 1, 2052 9,439,111 7.311
March 8, 2064 29,036,631 5.077
April 26, 2064 27,775,018 6.178
Oct. 13, 2066 25,401,805 14.125
March 14, 2077 24,635,958 14.032
Sept. 2, 2079 26,649,091 5.958
Oct. 12, 2079 27,850,876 4.624
March 25, 2091 12,624,030 6.646
Oct. 8, 2093 12,267,787 11.519
March 19, 2104 8,957,101 10.913
Oct. 3, 2106 10,481,629 7.102
March 27, 2118 16,196,573 5.927
Oct. 9, 2120 8,940,114 10.816
March 26, 2132 13,886,497 6.335
Oct. 8, 2134 2,724,430 9.447
March 23, 2146 333,937 9.145
Oct. 13, 2149 5,608,093 10.033
March 24, 2164 5,963,339 7.818
Oct. 16, 2167 16,291,696 12.193
March 28, 2182 19,071,705 5.263
Sept. 19, 2184 23,664,719 5.109
March 22, 2199 6,910,880 10.361

Images and Observations

2009 DO111's orbit is determined by observations dating back to Feb. 22, 2009. It was last officially observed on Feb. 28, 2023. The IAU Minor Planet Center records 279 observations used to determine its orbit.

Accessibility and Exploration

2009 DO111 can be reached with a journey of 394 days. This trajectory would require a delta-v of 10.03 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 11,463 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2009 DO111.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2009 DO111:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.051 AU
  • Eccentricity: 0.2814
  • Inclination: 2.98°
  • Longitude of Ascending Node: 1.95°
  • Argument of Periapsis: 273.57°
  • Mean Anomaly: 101.91°

Physical Characteristics

  • Diameter: ~0.128 km
  • Magnitude: 22.85

Derived Characteristics

  • Orbit Period: 394 days (1.08 years)
  • Avg. Orbit Speed: 29.02 km/s
  • Aphelion Distance: 1.35 AU
  • Perihelion Distance: 0.76 AU
  • Rotation Period: 0.05 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 2009 DO111 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 2009 DO111 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.