Montana

Key Facts

• Categorized as a Main-belt Asteroid
• Comparable in size to the city of Indianapolis (21.20 km diameter)
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

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

Montana orbits the sun every 1,480 days (4.05 years), coming as close as 2.39 AU and reaching as far as 2.69 AU from the sun. Montana is about 21.2 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.

The rotation of Montana has been observed. It completes a rotation on its axis every 4.55 hours.

Montana's spectral type S (Tholen) / S (SMASSII) indicates that it is likely to contain and .

No Close Approaches

Montana's orbit is 1.37 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

Montana's orbit is determined by observations dating back to Nov. 18, 1898. It was last officially observed on July 4, 2023. The IAU Minor Planet Center records 4,256 observations used to determine its orbit.

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

View asteroid Montana 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 Montana:

• 292 Ludovica (A890 HB)
• 355 Gabriella (A893 BD)
• 421 Zahringia (A896 RE)

References

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

Orbit Simulation

Sky Map

The position of Montana 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.