Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 26,972,227 km of Earth in 2021
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

152742 (1998 XE12) is a small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 1998 XE12 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.

1998 XE12 orbits the sun every 301 days (0.82 years), coming as close as 0.23 AU and reaching as far as 1.53 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 1998 XE12 is probably between 0.402 to 0.900 kilometers in diameter, making it small in absolute terms, but larger than ~97% of asteroids, very roughly comparable in size to the Golden Gate Bridge.

Close Approaches

1998 XE12's orbit is 0.11 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.

1998 XE12 has 24 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Nov. 19, 2021 26,972,227 21.371
Jan. 28, 2024 17,412,532 24.948
Jan. 25, 2038 22,305,047 27.013
Nov. 24, 2044 29,862,521 27.783
Nov. 22, 2058 25,055,192 25.741
Jan. 29, 2061 24,308,490 20.783
Nov. 21, 2072 23,453,474 24.318
Jan. 30, 2075 20,191,982 21.867
Nov. 20, 2086 23,763,257 22.990
Jan. 29, 2089 17,388,910 23.166
Nov. 20, 2100 26,720,849 21.413
Jan. 29, 2103 17,564,595 24.914
Jan. 27, 2117 21,963,244 26.842
Jan. 26, 2131 27,404,965 28.472
Nov. 25, 2137 26,932,174 26.703
Feb. 1, 2140 27,805,703 20.101
Nov. 24, 2151 23,967,459 25.088
Jan. 31, 2154 22,258,762 21.313
Nov. 22, 2165 23,380,905 23.280
Jan. 31, 2168 17,993,664 22.893
Nov. 22, 2179 25,868,185 21.700
Jan. 29, 2182 17,387,623 24.539
Nov. 21, 2193 29,376,744 20.592
Jan. 29, 2196 19,685,366 25.923

Images and Observations

1998 XE12's orbit is determined by observations dating back to Nov. 30, 1995. It was last officially observed on Feb. 9, 2019. The IAU Minor Planet Center records 335 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 1998 XE12:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.8782 AU
  • Eccentricity: 0.7392
  • Inclination: 13.44°
  • Longitude of Ascending Node: 280.05°
  • Argument of Periapsis: 353.12°
  • Mean Anomaly: 141.15°

Physical Characteristics

  • Diameter: ~0.519 km
  • Magnitude: 19.1

Derived Characteristics

  • Orbit Period: 301 days (0.82 years)
  • Avg. Orbit Speed: 31.74 km/s
  • Aphelion Distance: 1.53 AU
  • Perihelion Distance: 0.23 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 152742 (1998 XE12) 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.