Key Facts
- Categorized as a Amor-class Asteroid
- Comparable in size to a football field
- Will pass within 12,844,181 km of Earth in 2022
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
2015 UR51 is a very small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2015 UR51 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2015 UR51 orbits the sun every 855 days (2.34 years), coming as close as 1.02 AU and reaching as far as 2.51 AU from the sun. Based on its brightness and the way it reflects light, 2015 UR51 is probably between 0.227 to 0.508 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.
Close Approaches
2015 UR51's orbit is 0.03 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.
2015 UR51 has 6 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Oct. 27, 2022 | 12,844,181 | 12.245 |
| Nov. 7, 2029 | 7,461,944 | 12.340 |
| Oct. 30, 2097 | 9,260,763 | 12.138 |
| Nov. 12, 2104 | 13,662,705 | 12.625 |
| Oct. 24, 2172 | 19,128,513 | 12.635 |
| Nov. 7, 2179 | 5,400,805 | 12.200 |
Images and Observations
2015 UR51's orbit is determined by observations dating back to Oct. 17, 2015. It was last officially observed on Jan. 11, 2023. The IAU Minor Planet Center records 228 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 2015 UR51:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 1.763 AU
- Eccentricity: 0.4228
- Inclination: 19.36°
- Longitude of Ascending Node: 221.81°
- Argument of Periapsis: 176.88°
- Mean Anomaly: 134.76°
Physical Characteristics
- Diameter: ~0.293 km
- Magnitude: 20.34
Derived Characteristics
- Orbit Period: 855 days (2.34 years)
- Avg. Orbit Speed: 22.43 km/s
- Aphelion Distance: 2.51 AU
- Perihelion Distance: 1.02 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2015 UR51 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 below comparison is an artistic rendering that uses available data on the diameter of 2015 UR51 to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.
