18552 (1997 AM21)

Key Facts

• Categorized as a Main-belt Asteroid
• Comparable in size to the San Francisco Bay (4.88 km diameter)
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

18552 (1997 AM21) is a mid-sized asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified 1997 AM21 as potentially hazardous because its orbit does not bring it close to Earth.

1997 AM21 orbits the sun every 1,680 days (4.60 years), coming as close as 2.47 AU and reaching as far as 3.07 AU from the sun. 1997 AM21 is about 4.9 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.

The rotation of 1997 AM21 has been observed. It completes a rotation on its axis every 100.14 hours.

No Close Approaches

1997 AM21's orbit is 1.48 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

1997 AM21's orbit is determined by observations dating back to Jan. 13, 1997. It was last officially observed on Oct. 26, 2022. The IAU Minor Planet Center records 3,435 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 1997 AM21:

• 1 Ceres (A801 AA)
• 2 Pallas (A802 FA)
• 28 Bellona (A854 EA)

References

• JPL Small Body Database
• Mission Design
• Sky Finder Chart

Orbit Simulation

Sky Map

The position of 18552 (1997 AM21) 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 1997 AM21 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.