Rhiannon

Key Facts

• Categorized as a Amor-class Asteroid
• Comparable in size to the Golden Gate Bridge
• Classified as a Near Earth Asteroid (NEA)
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

Rhiannon is a small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified Rhiannon as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.

Rhiannon orbits the sun every 847 days (2.32 years), coming as close as 1.27 AU and reaching as far as 2.23 AU from the sun. Based on its brightness and the way it reflects light, Rhiannon is probably between 0.693 to 1.549 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

No Close Approaches

Rhiannon's orbit is 0.32 AU from Earth's orbit at its closest point. This means that there is a 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

Rhiannon's orbit is determined by observations dating back to Aug. 29, 1992. It was last officially observed on Aug. 28, 2022. The IAU Minor Planet Center records 257 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 Rhiannon:

• 8014 (1990 MF)
• 23606 (1996 AS1)
• 27002 (1998 DV9)

References

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

Orbit Simulation

Sky Map

The position of Rhiannon 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 Rhiannon 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.