Einer

Key Facts

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

Overview

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

Einer orbits the sun every 1,770 days (4.85 years), coming as close as 2.82 AU and reaching as far as 2.91 AU from the sun. Based on its brightness and the way it reflects light, Einer is probably between 4.432 to 9.909 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the San Francisco Bay.

The rotation of Einer has been observed. It completes a rotation on its axis every 12.92 hours.

No Close Approaches

Einer's orbit is 1.81 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

Einer's orbit is determined by observations dating back to Jan. 26, 1992. It was last officially observed on June 27, 2023. The IAU Minor Planet Center records 2,337 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 Einer:

• 33 Polyhymnia (A854 UB)
• 129 Antigone (A873 CA)
• 158 Koronis (A876 AA)

References

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

Orbit Simulation

Sky Map

The position of Einer 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 Einer 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.