2015 XW261

Very small Apollo-class Asteroid

Near-Earth
Space Reference » Apollo-class Asteroids » 2015 XW261

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 21,484,615 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2015 XW261 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2015 XW261 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.

2015 XW261 orbits the sun every 510 days (1.40 years), coming as close as 0.67 AU and reaching as far as 1.83 AU from the sun. Based on its brightness and the way it reflects light, 2015 XW261 is probably between 0.139 to 0.312 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2015 XW261's orbit is 0.12 AU from Earth's orbit at its closest point. This means that there is an wide berth between this asteroid and Earth at all times.

2015 XW261 has 17 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
July 3, 2020 21,484,615 21.841
Dec. 29, 2022 17,719,854 20.953
June 24, 2027 24,568,629 19.654
Jan. 1, 2069 28,756,871 17.594
July 6, 2073 24,150,650 22.637
Dec. 30, 2075 17,416,194 20.217
June 26, 2080 22,233,804 20.175
Dec. 26, 2082 27,118,014 23.396
July 11, 2126 29,319,398 23.742
Jan. 1, 2129 19,947,832 19.094
July 2, 2133 20,771,621 21.134
Dec. 29, 2135 21,262,722 22.008
June 20, 2140 28,919,591 19.126
Jan. 2, 2182 23,394,481 18.425
July 5, 2186 21,838,402 21.833
Dec. 30, 2188 18,961,138 21.138
June 24, 2193 25,242,515 19.626

Images and Observations

2015 XW261's orbit is determined by observations dating back to Jan. 16, 2009. It was last officially observed on July 30, 2016. The IAU Minor Planet Center records 181 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 XW261:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 1.249 AU
  • Eccentricity: 0.4669
  • Inclination: 29.67°
  • Longitude of Ascending Node: 269.94°
  • Argument of Periapsis: 289.41°
  • Mean Anomaly: 9.17°

Physical Characteristics

  • Diameter: ~0.180 km
  • Magnitude: 21.4

Derived Characteristics

  • Orbit Period: 510 days (1.40 years)
  • Avg. Orbit Speed: 26.64 km/s
  • Aphelion Distance: 1.83 AU
  • Perihelion Distance: 0.67 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2015 XW261 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 2015 XW261 to create an approximate landscape rendering. The approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.