85713 (1998 SS49)

Mid-sized Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 85713 (1998 SS49)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the island of Manhattan (3.48 km diameter)
  • Will pass within 21,149,531 km of Earth in 2022
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

85713 (1998 SS49) is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1998 SS49 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

1998 SS49 orbits the sun every 974 days (2.67 years), coming as close as 0.70 AU and reaching as far as 3.15 AU from the sun. 1998 SS49 is about 3.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the island of Manhattan.

The rotation of 1998 SS49 has been observed. It completes a rotation on its axis every 5.37 hours.

Close Approaches

1998 SS49's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

1998 SS49 has 5 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Nov. 21, 2022 21,149,531 21.364
Nov. 22, 2030 18,756,616 20.765
Nov. 21, 2038 20,630,893 21.304
Nov. 21, 2046 23,143,373 21.726
Nov. 20, 2054 25,058,214 22.167

Images and Observations

1998 SS49's orbit is determined by observations dating back to Sept. 29, 1998. It was last officially observed on June 30, 2023. The IAU Minor Planet Center records 1,443 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 SS49:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.924 AU
  • Eccentricity: 0.6386
  • Inclination: 10.78°
  • Longitude of Ascending Node: 40.96°
  • Argument of Periapsis: 103.14°
  • Mean Anomaly: 91.75°

Physical Characteristics

  • Diameter: 3.48400 km
  • Magnitude: 15.78
  • Albedo: 0.076

Derived Characteristics

  • Orbit Period: 974 days (2.67 years)
  • Avg. Orbit Speed: 21.49 km/s
  • Aphelion Distance: 3.15 AU
  • Perihelion Distance: 0.70 AU
  • Rotation Period: 5.37 hours

Map Comparison

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Orbit Simulation

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Sky Map

The position of 85713 (1998 SS49) 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 SS49 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.