Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 26,802,539 km of Earth in 2077
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation


2011 DO is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2011 DO 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.

2011 DO orbits the sun every 524 days (1.43 years), coming as close as 0.69 AU and reaching as far as 1.85 AU from the sun. Based on its brightness and the way it reflects light, 2011 DO is probably between 0.073 to 0.164 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2011 DO's orbit is 0.04 AU from Earth's orbit at its closest point. This means that there is an wide berth between this asteroid and Earth at all times.

2011 DO has 6 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 8, 2077 26,802,539 11.291
Aug. 31, 2079 19,373,492 12.537
Feb. 22, 2087 24,390,082 19.660
Feb. 10, 2146 22,455,851 11.951
Sept. 6, 2148 27,172,493 11.515
Aug. 12, 2161 29,397,409 20.524

Images and Observations

2011 DO's orbit is determined by observations dating back to Feb. 23, 2011. It was last officially observed on March 11, 2011. The IAU Minor Planet Center records 60 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 DO:



   or view a random object

Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 1.271 AU
  • Eccentricity: 0.4549
  • Inclination: 15.7°
  • Longitude of Ascending Node: 154.22°
  • Argument of Periapsis: 261.53°
  • Mean Anomaly: 125.4°

Physical Characteristics

  • Diameter: ~0.095 km
  • Magnitude: 22.8

Derived Characteristics

  • Orbit Period: 524 days (1.43 years)
  • Avg. Orbit Speed: 26.39 km/s
  • Aphelion Distance: 1.85 AU
  • Perihelion Distance: 0.69 AU

Map Comparison

Click to load map

Orbit Simulation

Sky Map

The position of 2011 DO 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 DO 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.