Key Facts

  • Categorized as a Amor-class Asteroid
  • Comparable in size to the island of Manhattan (4.20 km diameter)
  • Will pass within 12,296,774 km of Earth in 2025
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation


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

Alinda orbits the sun every 1,420 days (3.89 years), coming as close as 1.06 AU and reaching as far as 3.88 AU from the sun. Alinda is about 4.2 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the island of Manhattan.

The rotation of Alinda has been observed. It completes a rotation on its axis every 28.41 hours.

Close Approaches

Alinda'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.

Alinda has 2 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 8, 2025 12,296,774 8.249
Jan. 25, 2087 24,882,222 11.269

Images and Observations

Alinda's orbit is determined by observations dating back to Feb. 3, 1918. It was last officially observed on July 8, 2023. The IAU Minor Planet Center records 3,064 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 Alinda:



   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.472 AU
  • Eccentricity: 0.5709
  • Inclination: 9.4°
  • Longitude of Ascending Node: 110.42°
  • Argument of Periapsis: 350.47°
  • Mean Anomaly: 238.76°

Physical Characteristics

  • Diameter: 4.20000 km
  • Magnitude: 13.88
  • Albedo: 0.31
  • Spectral type (Tholen): S

Derived Characteristics

  • Orbit Period: 1,420 days (3.89 years)
  • Avg. Orbit Speed: 18.94 km/s
  • Aphelion Distance: 3.88 AU
  • Perihelion Distance: 1.06 AU
  • Rotation Period: 28.41 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Alinda 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 above comparison is an artistic rendering that uses available data on the diameter of Alinda to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.