Johnharmon

Key Facts

• Categorized as a Main-belt Asteroid
• Comparable in size to the San Francisco Bay (6.50 km diameter)
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

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

Johnharmon orbits the sun every 1,520 days (4.16 years), coming as close as 2.16 AU and reaching as far as 3.03 AU from the sun. Johnharmon is about 6.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.

The rotation of Johnharmon has been observed. It completes a rotation on its axis every 27.18 hours.

No Close Approaches

Johnharmon's orbit is 1.20 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

Johnharmon's orbit is determined by observations dating back to March 9, 1953. It was last officially observed on March 7, 2023. The IAU Minor Planet Center records 2,734 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 Johnharmon:

• 14 Irene (A851 KA)
• 32 Pomona (A854 UA)
• 56 Melete (A857 RB)

References

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

Orbit Simulation

Sky Map

The position of Johnharmon 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 Johnharmon 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.