199145 (2005 YY128)

Small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 199145 (2005 YY128)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 4,597,731 km of Earth in 2023
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

199145 (2005 YY128) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2005 YY128 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2005 YY128 orbits the sun every 774 days (2.12 years), coming as close as 0.44 AU and reaching as far as 2.86 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 2005 YY128 is probably between 0.584 to 1.306 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.

Close Approaches

2005 YY128's orbit is 0.03 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.

2005 YY128 has 12 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 16, 2023 4,597,731 24.649
Sept. 26, 2029 8,903,240 24.210
Feb. 18, 2059 7,310,026 23.230
Oct. 1, 2065 16,874,518 27.258
Feb. 9, 2076 26,552,496 29.700
Sept. 22, 2082 17,898,077 21.304
Feb. 23, 2112 18,013,045 20.926
Oct. 6, 2118 25,757,335 29.208
Feb. 12, 2129 18,204,632 27.953
Sept. 25, 2135 15,312,953 21.954
Feb. 17, 2165 5,783,841 24.873
Sept. 28, 2171 10,664,197 23.404

Images and Observations

2005 YY128's orbit is determined by observations dating back to Nov. 30, 2005. It was last officially observed on Feb. 15, 2023. The IAU Minor Planet Center records 504 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 2005 YY128:

References

Search

   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.65 AU
  • Eccentricity: 0.7314
  • Inclination: 3.76°
  • Longitude of Ascending Node: 300.19°
  • Argument of Periapsis: 314.91°
  • Mean Anomaly: 75.51°

Physical Characteristics

  • Diameter: ~0.754 km
  • Magnitude: 18.29

Derived Characteristics

  • Orbit Period: 774 days (2.12 years)
  • Avg. Orbit Speed: 23.19 km/s
  • Aphelion Distance: 2.86 AU
  • Perihelion Distance: 0.44 AU

Map Comparison

Click to load map

Orbit Simulation

⧉

Sky Map

The position of 199145 (2005 YY128) 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 2005 YY128 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.