Key Facts

  • Categorized as a Interior-Earth Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 27,734,801 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2017 YH is a small asteroid with an orbit that is entirely confined within Earth's orbit. NASA JPL has classified 2017 YH 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.

2017 YH orbits the sun every 185 days (0.51 years), coming as close as 0.33 AU and reaching as far as 0.94 AU from the sun. Based on its brightness and the way it reflects light, 2017 YH is probably between 0.555 to 1.242 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

2017 YH'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.

2017 YH has 21 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 19, 2019 27,734,801 17.057
Jan. 21, 2020 21,516,966 15.385
Jan. 21, 2021 17,811,615 13.876
Jan. 21, 2022 17,969,677 12.660
Jan. 21, 2023 21,690,801 11.854
Jan. 18, 2024 27,297,539 11.605
Jan. 19, 2065 24,722,955 16.282
Jan. 21, 2066 19,338,963 14.667
Jan. 22, 2067 17,262,067 13.253
Jan. 22, 2068 19,359,216 12.194
Jan. 19, 2069 24,364,851 11.655
Jan. 20, 2110 25,163,685 16.417
Jan. 22, 2111 19,581,667 14.759
Jan. 23, 2112 17,197,929 13.358
Jan. 22, 2113 18,972,157 12.270
Jan. 21, 2114 23,864,280 11.661
Jan. 21, 2155 24,913,532 16.352
Jan. 23, 2156 19,258,139 14.684
Jan. 23, 2157 17,074,400 13.228
Jan. 23, 2158 19,323,896 12.176
Jan. 21, 2159 24,484,845 11.661

Images and Observations

2017 YH's orbit is determined by observations dating back to Dec. 5, 2016. It was last officially observed on Jan. 6, 2020. The IAU Minor Planet Center records 72 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 2017 YH:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.6344 AU
  • Eccentricity: 0.4825
  • Inclination: 19.84°
  • Longitude of Ascending Node: 134.21°
  • Argument of Periapsis: 147.48°
  • Mean Anomaly: 130.07°

Physical Characteristics

  • Diameter: ~0.717 km
  • Magnitude: 18.4

Derived Characteristics

  • Orbit Period: 185 days (0.51 years)
  • Avg. Orbit Speed: 37.31 km/s
  • Aphelion Distance: 0.94 AU
  • Perihelion Distance: 0.33 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2017 YH 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.