118273 (1998 OX9)

Key Facts

• Categorized as a Mars-crossing Asteroid
• Comparable in size to the U.S. Pentagon
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

118273 (1998 OX9) is a mid-sized asteroid with an orbit that crosses the orbit of Mars. NASA JPL has not classified 1998 OX9 as potentially hazardous because its orbit does not bring it close to Earth.

1998 OX9 orbits the sun every 1,230 days (3.37 years), coming as close as 1.66 AU and reaching as far as 2.84 AU from the sun. Based on its brightness and the way it reflects light, 1998 OX9 is probably between 1.103 to 2.466 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. Pentagon.

No Close Approaches

1998 OX9's orbit is 0.65 AU from Earth's orbit at its closest point. This means that there is a very 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

1998 OX9's orbit is determined by observations dating back to July 26, 1998. It was last officially observed on Jan. 11, 2023. The IAU Minor Planet Center records 705 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 1998 OX9:

• 315 Constantia (A891 RB)
• 336 Lacadiera (A892 SA)
• 525 Adelaide (A908 UJ)

References

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

Orbit Simulation

Sky Map

The position of 118273 (1998 OX9) 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 1998 OX9 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.