Hirosetamotsu

Key Facts

• Categorized as a Main-belt Asteroid
• Comparable in size to the San Francisco Bay (9.62 km diameter)
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

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

Hirosetamotsu orbits the sun every 1,650 days (4.52 years), coming as close as 2.23 AU and reaching as far as 3.23 AU from the sun. Hirosetamotsu is about 9.6 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.

The rotation of Hirosetamotsu has been observed. It completes a rotation on its axis every 8.05 hours.

No Close Approaches

Hirosetamotsu's orbit is 1.23 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

Hirosetamotsu's orbit is determined by observations dating back to Oct. 9, 1988. It was last officially observed on July 5, 2023. The IAU Minor Planet Center records 3,715 observations used to determine its orbit.

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

View asteroid Hirosetamotsu 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 Hirosetamotsu:

• 45 Eugenia (A857 MA)
• 110 Lydia (A870 HA)
• 140 Siwa (A874 TB)

References

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

Orbit Simulation

Sky Map

The position of Hirosetamotsu 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.