Key Facts

  • Categorized as a Amor-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 15,619,890 km of Earth in 2046
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation


36017 (1999 ND43) is a small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 1999 ND43 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.

1999 ND43 orbits the sun every 687 days (1.88 years), coming as close as 1.04 AU and reaching as far as 2.00 AU from the sun. Based on its brightness and the way it reflects light, 1999 ND43 is probably between 0.390 to 0.871 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

The rotation of 1999 ND43 has been observed. It completes a rotation on its axis every 5.79 hours.

1999 ND43's spectral type None (Tholen) / Sl (SMASSII) indicates that it is likely to contain and .

Close Approaches

1999 ND43's orbit is 0.08 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.

1999 ND43 has 7 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 18, 2046 15,619,890 6.385
Oct. 23, 2061 19,320,962 5.085
Sept. 15, 2093 20,398,785 7.509
Oct. 18, 2108 16,910,068 4.473
Sept. 18, 2140 17,631,687 6.837
Oct. 29, 2155 20,887,121 5.490
Sept. 23, 2187 14,056,241 5.848

Images and Observations

1999 ND43's orbit is determined by observations dating back to July 14, 1999. It was last officially observed on April 7, 2021. The IAU Minor Planet Center records 955 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 1999 ND43:



   or view a random object

Orbital Elements

  • Epoch: 2459600.5 JD
  • Semi-major axis: 1.523 AU
  • Eccentricity: 0.3143
  • Inclination: 5.55°
  • Longitude of Ascending Node: 332.08°
  • Argument of Periapsis: 52.09°
  • Mean Anomaly: 306.56°

Physical Characteristics

  • Diameter: ~0.503 km
  • Magnitude: 19.17
  • Spectral type (SMASS): Sl

Derived Characteristics

  • Orbit Period: 687 days (1.88 years)
  • Avg. Orbit Speed: 24.12 km/s
  • Aphelion Distance: 2.00 AU
  • Perihelion Distance: 1.04 AU
  • Rotation Period: 5.79 hours
  • Approx. Composition: and .

Map Comparison

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Orbit Simulation

Sky Map

The position of 36017 (1999 ND43) 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 1999 ND43 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.