154629 (2003 UM263)

Key Facts

• Categorized as a Outer Main-belt Asteroid
• Comparable in size to the island of Manhattan
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

154629 (2003 UM263) is a mid-sized asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified 2003 UM263 as potentially hazardous because its orbit does not bring it close to Earth.

2003 UM263 orbits the sun every 2,870 days (7.86 years), coming as close as 3.32 AU and reaching as far as 4.59 AU from the sun. Based on its brightness and the way it reflects light, 2003 UM263 is probably between 3.166 to 7.080 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the island of Manhattan.

No Close Approaches

2003 UM263's orbit is 2.32 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

2003 UM263's orbit is determined by observations dating back to March 21, 1999. It was last officially observed on May 18, 2023. The IAU Minor Planet Center records 401 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 2003 UM263:

• 748 Simeisa (A913 EL)
• 1212 Francette (1931 XC)
• 1512 Oulu (1939 FE)

References

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

Orbit Simulation

Sky Map

The position of 154629 (2003 UM263) 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 2003 UM263 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.