Alexandra

Key Facts

• Categorized as a Main-belt Asteroid
• Comparable in size to the U.S. state of Vermont (160.12 km diameter)
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

Alexandra is a large asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified Alexandra as potentially hazardous because its orbit does not bring it close to Earth.

Alexandra orbits the sun every 1,630 days (4.46 years), coming as close as 2.18 AU and reaching as far as 3.24 AU from the sun. Alexandra is about 160.1 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Vermont.

The rotation of Alexandra has been observed. It completes a rotation on its axis every 7.02 hours.

Alexandra's spectral type C (Tholen) / C (SMASSII) indicates that it is likely to contain water, iron, nickel, cobalt, nitrogen, and ammonia.

No Close Approaches

Alexandra's orbit is 1.16 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

Alexandra's orbit is determined by observations dating back to May 23, 1996. It was last officially observed on June 28, 2023. The IAU Minor Planet Center records 9,047 observations used to determine its orbit.

Scientists have been able to determine this object's shape:

View asteroid Alexandra in 3D.

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 Alexandra:

• 45 Eugenia (A857 MA)
• 59 Elpis (A860 RA)
• 103 Hera (A868 RA)

References

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

Orbit Simulation

Sky Map

The position of Alexandra 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.