Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the U.S. Pentagon
  • Will pass within 929,247 km of Earth in 2028
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

35396 (1997 XF11) is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1997 XF11 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

1997 XF11 orbits the sun every 633 days (1.73 years), coming as close as 0.74 AU and reaching as far as 2.14 AU from the sun. Based on its brightness and the way it reflects light, 1997 XF11 is probably between 1.108 to 2.478 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. Pentagon.

The rotation of 1997 XF11 has been observed. It completes a rotation on its axis every 3.26 days.

1997 XF11's spectral type None (Tholen) / Xk (SMASSII) indicates that it is likely to contain nickel, iron, and cobalt.

Close Approaches

1997 XF11's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.

1997 XF11 has 14 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Oct. 26, 2028 929,247 13.920
June 8, 2035 26,142,435 9.736
Nov. 4, 2040 22,831,699 18.600
May 10, 2078 18,430,304 17.553
Oct. 9, 2083 23,236,364 10.016
May 19, 2090 5,543,600 13.412
Oct. 27, 2095 1,959,326 13.688
May 19, 2102 4,868,911 13.634
Oct. 15, 2107 20,139,528 10.342
May 12, 2114 15,738,709 16.991
Nov. 2, 2148 11,943,528 16.413
May 26, 2155 13,977,654 11.495
Oct. 22, 2160 10,731,662 11.960
May 16, 2167 8,727,397 15.507

Images and Observations

1997 XF11's orbit is determined by observations dating back to March 22, 1990. It was last officially observed on March 6, 2019. The IAU Minor Planet Center records 1,745 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 1997 XF11:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 1.443 AU
  • Eccentricity: 0.484
  • Inclination: 4.1°
  • Longitude of Ascending Node: 213.75°
  • Argument of Periapsis: 102.92°
  • Mean Anomaly: 81.82°

Physical Characteristics

  • Diameter: ~1.430 km
  • Magnitude: 16.9
  • Spectral type (SMASS): Xk

Derived Characteristics

  • Orbit Period: 633 days (1.73 years)
  • Avg. Orbit Speed: 24.80 km/s
  • Aphelion Distance: 2.14 AU
  • Perihelion Distance: 0.74 AU
  • Rotation Period: 3.26 days
  • Approx. Composition: nickel, iron, and cobalt.

Size Comparison

Orbit Simulation

Sky Map

The position of 35396 (1997 XF11) 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.