Key Facts

  • Categorized as a Amor-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 23,443,284 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2019 SF2 is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2019 SF2 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.

2019 SF2 orbits the sun every 562 days (1.54 years), coming as close as 1.05 AU and reaching as far as 1.61 AU from the sun. Based on its brightness and the way it reflects light, 2019 SF2 is probably between 0.380 to 1.700 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the Golden Gate Bridge.

Close Approaches

2019 SF2's orbit is 0.08 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.

2019 SF2 has 7 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Dec. 3, 2019 23,443,284 5.107
Dec. 3, 2039 21,288,542 4.689
Nov. 25, 2096 19,855,782 3.064
Nov. 28, 2116 21,793,306 3.228
Dec. 5, 2159 22,965,487 4.966
Dec. 3, 2179 17,501,465 3.906
Dec. 6, 2199 25,368,287 5.457

Images and Observations

2019 SF2's orbit is determined by observations dating back to Jan. 26, 2017. It was last officially observed on Jan. 22, 2020. The IAU Minor Planet Center records 77 observations used to determine its orbit.

Accessibility and Exploration

2019 SF2 can be reached with a journey of 418 days. This trajectory would require a delta-v of 10.155 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 7,093 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2019 SF2.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2019 SF2:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 1.332 AU
  • Eccentricity: 0.212
  • Inclination: 3.32°
  • Longitude of Ascending Node: 293.86°
  • Argument of Periapsis: 127.19°
  • Mean Anomaly: 116.31°

Physical Characteristics

  • Diameter: ~1.040 km
  • Magnitude: 23.3

Derived Characteristics

  • Orbit Period: 562 days (1.54 years)
  • Avg. Orbit Speed: 25.78 km/s
  • Aphelion Distance: 1.61 AU
  • Perihelion Distance: 1.05 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2019 SF2 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.