Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to the city of Cleveland, Ohio
  • Will pass within 5,427,712 km of Earth in 2021
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

163899 (2003 SD220) is a large asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2003 SD220 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2003 SD220 orbits the sun every 275 days (0.75 years), coming as close as 0.65 AU and reaching as far as 1.00 AU from the sun. Based on its brightness and the way it reflects light, 2003 SD220 is probably between 4.580 to 20.460 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the city of Cleveland, Ohio.

The rotation of 2003 SD220 has been observed. It completes a rotation on its axis every 285.00 days.

Close Approaches

2003 SD220's orbit is 0.02 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.

2003 SD220 has 22 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Dec. 17, 2021 5,427,712 5.611
Dec. 2, 2024 13,215,538 5.481
Nov. 12, 2027 20,672,990 6.552
Dec. 23, 2064 18,699,238 9.313
Dec. 24, 2067 7,251,327 7.159
Dec. 20, 2070 2,717,403 6.043
Dec. 12, 2073 8,758,905 5.425
Nov. 23, 2076 16,600,832 5.817
Nov. 8, 2079 24,527,963 7.575
Dec. 24, 2113 24,825,651 10.497
Dec. 24, 2116 11,667,301 7.944
Dec. 23, 2119 2,733,345 6.282
Dec. 19, 2122 4,611,941 5.707
Dec. 8, 2125 11,383,841 5.461
Nov. 19, 2128 18,711,499 6.205
Nov. 8, 2131 26,806,910 8.183
Dec. 24, 2168 20,184,563 9.547
Dec. 25, 2171 8,724,125 7.388
Dec. 21, 2174 2,405,565 6.115
Dec. 14, 2177 7,705,137 5.512
Nov. 27, 2180 15,635,072 5.800
Nov. 12, 2183 23,992,274 7.450

Images and Observations

2003 SD220's orbit is determined by observations dating back to Jan. 6, 2000. It was last officially observed on Oct. 27, 2019. The IAU Minor Planet Center records 1,079 observations used to determine its orbit.

Accessibility and Exploration

2003 SD220 can be reached with a journey of 178 days. This trajectory would require a delta-v of 9.851 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 2,535 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2003 SD220.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2003 SD220:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.8267 AU
  • Eccentricity: 0.2107
  • Inclination: 8.51°
  • Longitude of Ascending Node: 273.92°
  • Argument of Periapsis: 326.93°
  • Mean Anomaly: 192.51°

Physical Characteristics

  • Diameter: ~12.520 km
  • Magnitude: 17.9

Derived Characteristics

  • Orbit Period: 275 days (0.75 years)
  • Avg. Orbit Speed: 32.70 km/s
  • Aphelion Distance: 1.00 AU
  • Perihelion Distance: 0.65 AU
  • Rotation Period: 285.00 days

Size Comparison

Orbit Simulation

Sky Map

The position of 163899 (2003 SD220) 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.