Key Facts

  • Categorized as a Amor-class Asteroid
  • Comparable in size to the U.S. Pentagon
  • Will pass within 24,650,652 km of Earth in 2049
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

Norwan is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified Norwan 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.

Norwan orbits the sun every 717 days (1.96 years), coming as close as 1.07 AU and reaching as far as 2.06 AU from the sun. Based on its brightness and the way it reflects light, Norwan is probably between 1.058 to 2.366 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. Pentagon.

The rotation of Norwan has been observed. It completes a rotation on its axis every 35.90 days.

Norwan's spectral type None (Tholen) / S (SMASSII) indicates that it is likely to contain magnesium silicate and iron silicate.

Close Approaches

Norwan's orbit is 0.16 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.

Norwan has 3 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 10, 2049 24,650,652 6.231
Sept. 13, 2102 24,383,851 5.693
Sept. 14, 2155 24,523,227 5.536

Images and Observations

Norwan's orbit is determined by observations dating back to May 1, 1982. It was last officially observed on July 25, 2019. The IAU Minor Planet Center records 1,049 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 Norwan:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 1.568 AU
  • Eccentricity: 0.3168
  • Inclination: 9.45°
  • Longitude of Ascending Node: 124.38°
  • Argument of Periapsis: 256.84°
  • Mean Anomaly: 14.88°

Physical Characteristics

  • Diameter: ~1.366 km
  • Magnitude: 17.0
  • Spectral type (SMASS): S

Derived Characteristics

  • Orbit Period: 717 days (1.96 years)
  • Avg. Orbit Speed: 23.79 km/s
  • Aphelion Distance: 2.06 AU
  • Perihelion Distance: 1.07 AU
  • Rotation Period: 35.90 hours
  • Approx. Composition: magnesium silicate and iron silicate.

Map Comparison

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Orbit Simulation

Sky Map

The position of Norwan 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.