Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 13,897,619 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 0.004 to 0.019 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 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 22, 2024 13,897,619 3.869
Feb. 9, 2030 29,161,981 8.724
Nov. 21, 2046 5,657,461 5.373
April 24, 2047 26,439,961 5.072
Nov. 29, 2052 3,887,400 4.025
April 2, 2053 22,818,306 3.811
Feb. 8, 2059 16,924,576 5.223
Nov. 21, 2075 8,940,602 5.974
Dec. 28, 2081 11,501,996 3.768
Feb. 10, 2088 27,587,617 8.370

NASA Sentry has assessed impact risk for 75 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 ±1.18 1.08500 0.01293
Nov. 24, 2104 4,205.10 ±1.63 0.03745 0.01291
Nov. 25, 2110 5,322.18 ±1.98 0.00748 0.01292
Nov. 24, 2108 3,730.02 ±1.69 0.00138 0.01294
Nov. 24, 2105 4,262.88 ±1.14 0.00128 0.01291
Nov. 24, 2108 1,194.12 ±1.95 0.00113 0.01292
Nov. 24, 2107 1,040.04 ±1.22 0.00067 0.01293
Nov. 24, 2104 2,150.70 ±2.30 0.00059 0.01295
Nov. 24, 2113 584.22 ±1.52 0.00041 0.01293
Nov. 24, 2119 1,527.96 ±1.69 0.00039 0.01293
Nov. 24, 2102 4,519.68 ±1.98 0.00036 0.01293
Nov. 24, 2112 1,129.92 ±1.60 0.00036 0.01294
Nov. 24, 2114 834.60 ±1.43 0.00034 0.01293
Nov. 24, 2112 719.04 ±1.64 0.00032 0.01294
Nov. 23, 2098 757.56 ±2.02 0.00017 0.01294
Nov. 24, 2120 3,511.74 ±1.90 0.00016 0.01296
Nov. 24, 2108 1,399.56 ±2.10 0.00012 0.0129
Nov. 23, 2097 847.44 ±1.85 0.00012 0.01294
Nov. 23, 2092 609.90 ±2.17 0.00011 0.01292
Nov. 24, 2117 5,668.86 ±1.58 0.00010 0.01292
Nov. 24, 2112 1,611.42 ±1.83 0.00010 0.01296
Nov. 23, 2089 5,893.56 ±2.31 0.00009 0.01294
Nov. 24, 2119 1,977.36 ±1.81 0.00009 0.01292
Nov. 24, 2109 918.06 ±1.71 0.00009 0.01293
Nov. 24, 2118 494.34 ±1.99 0.00009 0.01295
Nov. 24, 2110 1,341.78 ±2.30 0.00009 0.01293
Nov. 24, 2110 648.42 ±1.49 0.00008 0.01294
Nov. 24, 2111 950.16 ±1.45 0.00008 0.01292
Nov. 24, 2112 301.74 ±1.44 0.00008 0.01294
Nov. 24, 2108 4,224.36 ±2.23 0.00008 0.01291
Nov. 24, 2114 706.20 ±1.60 0.00008 0.01293
Nov. 24, 2117 314.58 ±1.79 0.00008 0.01294
Nov. 24, 2115 1,771.92 ±1.67 0.00007 0.01293
Nov. 24, 2113 2,401.08 ±1.54 0.00007 0.01292
Nov. 24, 2116 1,836.12 ±1.75 0.00007 0.01293
Nov. 24, 2111 2,670.72 ±7.45 0.00007 0.01291
Nov. 24, 2106 2,612.94 ±2.20 0.00006 0.01297
Nov. 24, 2116 3,460.38 ±1.85 0.00006 0.01295
Nov. 24, 2120 4,564.62 ±2.37 0.00006 0.01294
Nov. 24, 2106 2,394.66 ±1.98 0.00006 0.01295
Nov. 24, 2113 192.60 ±1.69 0.00005 0.01293
Nov. 24, 2115 3,678.66 ±2.08 0.00005 0.01294
Nov. 25, 2103 6,073.32 ±1.91 0.00005 0.01293
Nov. 24, 2109 1,425.24 ±1.89 0.00005 0.01295
Nov. 24, 2108 2,035.14 ±1.89 0.00004 0.01295
Nov. 24, 2115 115.56 ±1.57 0.00004 0.01294
Nov. 24, 2108 1,804.02 ±2.03 0.00004 0.01294
Nov. 24, 2111 5,964.18 ±4.59 0.00004 0.01292
Nov. 24, 2114 3,261.36 ±1.75 0.00004 0.01295
Nov. 24, 2118 2,054.40 ±1.58 0.00004 0.01297
Nov. 24, 2107 770.40 ±1.33 0.00003 0.01291
Nov. 24, 2108 475.08 ±1.81 0.00003 0.01294
Nov. 24, 2119 5,213.04 ±1.77 0.00003 0.01291
Nov. 24, 2120 2,645.04 ±1.69 0.00003 0.01293
Nov. 24, 2106 3,646.56 ±1.78 0.00003 0.01294
Nov. 25, 2115 4,256.46 ±2.42 0.00003 0.01295
Nov. 24, 2118 6,086.16 ±1.69 0.00003 0.01296
Nov. 23, 2094 333.84 ±2.82 0.00002 0.01295
Nov. 24, 2113 5,720.22 ±0.93 0.00002 0.01292
Nov. 24, 2114 2,336.88 ±1.59 0.00002 0.01294
Nov. 24, 2086 3,864.84 ±1.91 0.00002 0.01296
Nov. 24, 2108 6,182.46 ±2.03 0.00001 0.01293
Nov. 24, 2118 4,731.54 ±1.75 0.00001 0.01297
Nov. 24, 2106 5,784.42 ±1.70 0.00001 0.01296
Nov. 24, 2118 5,970.60 ±1.50 0.00001 0.01296
Nov. 24, 2115 6,413.58 ±1.28 0.00001 0.01294
Nov. 24, 2113 5,180.94 ±1.62 0.00001 0.01288
Nov. 24, 2118 5,700.96 ±1.81 0.00001 0.01297
Nov. 24, 2112 5,232.30 ±1.62 0.00001 0.01289
Nov. 24, 2112 5,765.16 ±1.62 0.00001 0.01289
Nov. 24, 2106 6,355.80 ±2.33 0.00001 0.01295
Nov. 24, 2114 5,354.28 ±1.60 0.00001 0.01289
Nov. 24, 2117 706.20 ±1.93 0.00000 0.0129
Nov. 24, 2119 5,932.08 ±1.62 0.00000 0.01289
Nov. 24, 2083 4,269.30 ±1.11 0.00000 0.013

Images and Observations

2017 WT28's orbit is determined by observations dating back to Nov. 27, 2017. It was last officially observed on Dec. 16, 2017. The IAU Minor Planet Center records 28 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 7.41 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 103,616 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: 2459396.5 JD
  • Semi-major axis: 0.9 AU
  • Eccentricity: 0.1308
  • Inclination: 5.77°
  • Longitude of Ascending Node: 243.06°
  • Argument of Periapsis: 35.89°
  • Mean Anomaly: 211.22°

Physical Characteristics

  • Diameter: ~0.012 km
  • Magnitude: 28.1

Derived Characteristics

  • Orbit Period: 312 days (0.85 years)
  • Avg. Orbit Speed: 31.38 km/s
  • Aphelion Distance: 1.02 AU
  • Perihelion Distance: 0.78 AU

Map Comparison

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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.