Ninian

Key Facts

• Categorized as a Main-belt Asteroid
• Comparable in size to the San Francisco Bay (5.00 km diameter)
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

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

Ninian orbits the sun every 1,250 days (3.42 years), coming as close as 1.78 AU and reaching as far as 2.75 AU from the sun. Ninian is about 5.0 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.

The rotation of Ninian has been observed. It completes a rotation on its axis every 56.72 hours.

Ninian's spectral type None (Tholen) / S (SMASSII) indicates that it is likely to contain and .

No Close Approaches

Ninian's orbit is 0.78 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

Ninian's orbit is determined by observations dating back to Dec. 7, 1953. It was last officially observed on June 8, 2023. The IAU Minor Planet Center records 3,367 observations used to determine its orbit.

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

View asteroid Ninian 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 Ninian:

• 40 Harmonia (A856 FA)
• 72 Feronia (A861 KA)
• 298 Baptistina (A890 RB)

References

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

Orbit Simulation

Sky Map

The position of Ninian 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 Ninian 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.