Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 5,472,352 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2019 BZ4 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2019 BZ4 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 BZ4 orbits the sun every 735 days (2.01 years), coming as close as 1.00 AU and reaching as far as 2.19 AU from the sun. Based on its brightness and the way it reflects light, 2019 BZ4 is probably between 0.010 to 0.044 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2019 BZ4's orbit is 0.02 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.

2019 BZ4 has 12 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 22, 2019 5,472,352 5.425
Jan. 16, 2021 3,768,410 5.026
Jan. 24, 2023 6,316,400 5.603
Feb. 4, 2025 14,941,724 7.676
Feb. 13, 2027 27,615,961 10.452
Nov. 29, 2139 26,899,653 10.253
Dec. 7, 2141 14,894,019 7.587
Dec. 19, 2143 6,314,308 5.574
Dec. 27, 2145 3,834,040 4.976
Dec. 21, 2147 5,911,540 5.439
Dec. 8, 2149 13,894,548 7.368
Nov. 30, 2151 25,405,861 9.927

Images and Observations

2019 BZ4's orbit is determined by observations dating back to Jan. 30, 2019. It was last officially observed on Feb. 5, 2021. The IAU Minor Planet Center records 73 observations used to determine its orbit.

Accessibility and Exploration

2019 BZ4 can be reached with a journey of 378 days. This trajectory would require a delta-v of 10.408 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 883 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2019 BZ4.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2019 BZ4:

References

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Orbital Elements

  • Epoch: 2460000.5 JD
  • Semi-major axis: 1.593 AU
  • Eccentricity: 0.3718
  • Inclination: 1.81°
  • Longitude of Ascending Node: 109.38°
  • Argument of Periapsis: 354.58°
  • Mean Anomaly: 23.3°

Physical Characteristics

  • Diameter: ~0.027 km
  • Magnitude: 26.25

Derived Characteristics

  • Orbit Period: 735 days (2.01 years)
  • Avg. Orbit Speed: 23.58 km/s
  • Aphelion Distance: 2.19 AU
  • Perihelion Distance: 1.00 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2019 BZ4 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.