20429 (1998 YN1)

Small Apollo-class Asteroid

Near-Earth
Space Reference » Apollo-class Asteroids » 20429 (1998 YN1)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 17,746,634 km of Earth in 2032
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

20429 (1998 YN1) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1998 YN1 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 YN1 orbits the sun every 709 days (1.94 years), coming as close as 0.83 AU and reaching as far as 2.28 AU from the sun. Based on its brightness and the way it reflects light, 1998 YN1 is probably between 0.749 to 1.675 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

The rotation of 1998 YN1 has been observed. It completes a rotation on its axis every 2.72 hours.

Close Approaches

1998 YN1's orbit is 0.06 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.

1998 YN1 has 16 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 1, 2032 17,746,634 9.783
March 13, 2034 22,155,357 9.424
June 4, 2065 17,046,938 9.835
March 16, 2067 22,691,372 9.444
July 7, 2096 28,368,896 17.016
May 21, 2098 21,896,562 9.903
March 2, 2100 18,543,515 9.942
July 3, 2129 17,686,461 14.760
May 8, 2131 25,191,817 10.255
Feb. 21, 2133 16,279,388 11.639
June 28, 2162 10,442,549 12.862
April 22, 2164 26,637,869 10.355
Feb. 15, 2166 19,343,837 13.705
June 22, 2195 9,754,650 11.210
April 8, 2197 26,151,638 10.117
Feb. 10, 2199 27,825,826 16.152

Images and Observations

1998 YN1's orbit is determined by observations dating back to Dec. 16, 1998. It was last officially observed on Jan. 21, 2022. The IAU Minor Planet Center records 591 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 YN1:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.556 AU
  • Eccentricity: 0.4641
  • Inclination: 6.3°
  • Longitude of Ascending Node: 61.73°
  • Argument of Periapsis: 147.68°
  • Mean Anomaly: 199.34°

Physical Characteristics

  • Diameter: ~0.967 km
  • Magnitude: 17.75

Derived Characteristics

  • Orbit Period: 709 days (1.94 years)
  • Avg. Orbit Speed: 23.88 km/s
  • Aphelion Distance: 2.28 AU
  • Perihelion Distance: 0.83 AU
  • Rotation Period: 2.72 hours

Map Comparison

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Orbit Simulation

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Sky Map

The position of 20429 (1998 YN1) 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 1998 YN1 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.