Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 14,053,916 km of Earth in 2024
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2017 WT28 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2017 WT28 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.

2017 WT28 orbits the sun every 312 days (0.85 years), coming as close as 0.78 AU and reaching as far as 1.02 AU from the sun. Based on its brightness and the way it reflects light, 2017 WT28 is probably between 0.042 to 0.190 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2017 WT28'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.

2017 WT28 has 2 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 24, 2024 14,053,916 3.903
Nov. 22, 2046 4,353,409 5.157

NASA Sentry has assessed impact risk for 60 very close approach scenarios. Here are the top scenarios ordered by probability of impact:

Date Distance from Earth (km) Distance Error (km) Probability of Impact (%) Impact Energy (Mt)
Nov. 24, 2104 5,405.64 ±2.59 0.29310 0.01257
Nov. 24, 2104 4,211.52 ±3.68 0.06354 0.01255
Nov. 24, 2108 3,736.44 ±3.86 0.00215 0.01259
Nov. 25, 2110 5,322.18 ±4.47 0.00210 0.01257
Nov. 24, 2083 4,275.72 ±2.30 0.00109 0.01265
Nov. 24, 2108 1,200.54 ±4.42 0.00035 0.01257
Nov. 23, 2089 5,899.98 ±5.15 0.00034 0.01259
Nov. 24, 2105 4,262.88 ±2.73 0.00033 0.01256
Nov. 23, 2097 847.44 ±4.24 0.00024 0.01259
Nov. 24, 2104 2,150.70 ±5.09 0.00022 0.01259
Nov. 24, 2106 2,606.52 ±4.98 0.00020 0.01262
Nov. 24, 2107 1,040.04 ±1.58 0.00019 0.01258
Nov. 24, 2102 4,519.68 ±4.35 0.00018 0.01258
Nov. 24, 2108 1,405.98 ±4.76 0.00014 0.01255
Nov. 24, 2086 3,871.26 ±4.46 0.00011 0.01261
Nov. 24, 2113 584.22 ±3.86 0.00011 0.01257
Nov. 24, 2112 1,129.92 ±3.86 0.00009 0.01258
Nov. 24, 2114 834.60 ±4.46 0.00009 0.01258
Nov. 24, 2112 719.04 ±2.23 0.00008 0.01259
Nov. 23, 2098 706.20 ±4.53 0.00007 0.01259
Nov. 24, 2114 3,261.36 ±4.00 0.00006 0.0126
Nov. 23, 2094 295.32 ±7.72 0.00006 0.01259
Nov. 25, 2106 5,816.52 ±4.02 0.00005 0.01261
Nov. 24, 2107 776.82 ±3.86 0.00005 0.01256
Nov. 24, 2114 1,913.16 ±2.88 0.00005 0.0127
Nov. 23, 2092 609.90 ±3.15 0.00004 0.01257
Nov. 24, 2106 5,778.00 ±3.15 0.00003 0.0126
Nov. 24, 2110 1,341.78 ±5.18 0.00003 0.01257
Nov. 24, 2108 6,176.04 ±4.46 0.00003 0.01258
Nov. 24, 2116 5,797.26 ±0.00 0.00003 0.01256
Nov. 24, 2106 2,394.66 ±0.00 0.00003 0.0126
Nov. 24, 2117 5,668.86 ±0.00 0.00003 0.01257
Nov. 25, 2103 6,079.74 ±3.86 0.00003 0.01258
Nov. 24, 2109 1,431.66 ±4.35 0.00003 0.0126
Nov. 24, 2112 5,225.88 ±3.61 0.00002 0.01254
Nov. 24, 2109 969.42 ±35.67 0.00002 0.01257
Nov. 24, 2110 577.80 ±0.00 0.00002 0.01259
Nov. 24, 2112 423.72 ±0.00 0.00002 0.01258
Nov. 24, 2108 4,185.84 ±0.00 0.00002 0.01256
Nov. 24, 2113 5,174.52 ±3.15 0.00002 0.01253
Nov. 24, 2114 667.68 ±0.00 0.00002 0.01257
Nov. 24, 2113 2,401.08 ±0.00 0.00002 0.01257
Nov. 24, 2115 1,579.32 ±35.67 0.00002 0.01258
Nov. 24, 2116 1,797.60 ±0.00 0.00002 0.01257
Nov. 24, 2106 6,349.38 ±5.46 0.00002 0.0126
Nov. 24, 2112 5,758.74 ±3.94 0.00002 0.01254
Nov. 24, 2115 3,685.08 ±0.00 0.00001 0.01259
Nov. 24, 2114 5,347.86 ±4.98 0.00001 0.01254
Nov. 25, 2115 4,076.70 ±5.35 0.00001 0.01259
Nov. 23, 2097 4,108.80 ±4.98 0.00001 0.01259
Nov. 24, 2117 590.64 ±0.00 0.00001 0.01255
Nov. 24, 2112 5,457.00 ±8.92 0.00001 0.01262
Nov. 24, 2098 5,720.22 ±4.42 0.00001 0.01269
Nov. 25, 2111 3,665.82 ±3.70 0.00001 0.01269
Nov. 25, 2111 3,781.38 ±4.43 0.00001 0.0127
Nov. 25, 2107 1,097.82 ±4.79 0.00000 0.01271
Nov. 25, 2106 6,220.98 ±4.02 0.00000 0.01269
Nov. 24, 2117 3,479.64 ±3.78 0.00000 0.01251
Nov. 24, 2082 6,163.20 ±4.48 0.00000 0.01269
Nov. 24, 2081 1,560.06 ±4.15 0.00000 0.01243

Images and Observations

2017 WT28's orbit is determined by observations dating back to Nov. 28, 2017. It was last officially observed on Dec. 16, 2017. The IAU Minor Planet Center records 24 observations used to determine its orbit.

Accessibility and Exploration

2017 WT28 can be reached with a journey of 370 days. This trajectory would require a delta-v of 7.399 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 102,439 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2017 WT28.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2017 WT28:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 0.899922169181 AU
  • Eccentricity: 0.13092212182
  • Inclination: 5.77413962096°
  • Longitude of Ascending Node: 243.063608076°
  • Argument of Periapsis: 35.880226297°
  • Mean Anomaly: 12.3897829769°

Physical Characteristics

  • Diameter: ~0.116 km
  • Magnitude: 28.1

Derived Characteristics

  • Orbit Period: 312 days (0.85 years)
  • Avg. Orbit Speed: 31.40 km/s
  • Aphelion Distance: 1.02 AU
  • Perihelion Distance: 0.78 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2017 WT28 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.