Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 14,039,384 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 3 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 24, 2024 14,039,384 3.899
Nov. 22, 2046 4,473,392 5.177
April 23, 2047 26,027,103 4.973

NASA Sentry has assessed impact risk for 71 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 ±2.15 0.32130 0.01292
Nov. 24, 2104 4,211.52 ±2.96 0.07488 0.01291
Nov. 25, 2110 5,322.18 ±3.58 0.00226 0.01292
Nov. 24, 2108 3,736.44 ±3.10 0.00218 0.01294
Nov. 24, 2083 4,275.72 ±1.93 0.00102 0.013
Nov. 24, 2108 1,200.54 ±3.64 0.00039 0.01292
Nov. 24, 2105 4,262.88 ±1.91 0.00035 0.01291
Nov. 23, 2089 5,899.98 ±4.12 0.00034 0.01294
Nov. 23, 2097 853.86 ±3.39 0.00024 0.01294
Nov. 24, 2104 2,157.12 ±4.07 0.00023 0.01295
Nov. 24, 2107 1,040.04 ±2.28 0.00021 0.01293
Nov. 24, 2106 2,606.52 ±3.98 0.00020 0.01297
Nov. 24, 2102 4,519.68 ±3.53 0.00018 0.01293
Nov. 24, 2108 1,405.98 ±3.87 0.00016 0.0129
Nov. 24, 2113 584.22 ±2.82 0.00011 0.01293
Nov. 24, 2119 1,527.96 ±3.13 0.00011 0.01293
Nov. 24, 2086 3,871.26 ±3.57 0.00011 0.01297
Nov. 24, 2112 1,129.92 ±2.97 0.00010 0.01294
Nov. 24, 2114 834.60 ±2.66 0.00009 0.01293
Nov. 24, 2112 719.04 ±3.03 0.00009 0.01294
Nov. 24, 2118 2,060.82 ±2.95 0.00009 0.01297
Nov. 23, 2098 706.20 ±3.70 0.00007 0.01294
Nov. 24, 2114 3,261.36 ±3.21 0.00006 0.01295
Nov. 24, 2107 776.82 ±2.48 0.00006 0.01291
Nov. 25, 2106 5,810.10 ±3.46 0.00005 0.01297
Nov. 24, 2118 6,086.16 ±3.11 0.00005 0.01296
Nov. 24, 2114 1,913.16 ±2.38 0.00004 0.01306
Nov. 24, 2118 500.76 ±3.66 0.00004 0.01295
Nov. 23, 2092 609.90 ±3.96 0.00004 0.01292
Nov. 24, 2110 1,483.02 ±4.12 0.00003 0.01293
Nov. 24, 2106 5,778.00 ±3.12 0.00003 0.01296
Nov. 24, 2116 5,771.58 ±2.81 0.00003 0.01291
Nov. 24, 2116 3,453.96 ±3.34 0.00003 0.01295
Nov. 24, 2112 5,225.88 ±2.93 0.00003 0.01289
Nov. 24, 2117 5,668.86 ±2.88 0.00003 0.01292
Nov. 24, 2083 5,232.30 ±4.08 0.00003 0.01295
Nov. 24, 2108 6,176.04 ±3.70 0.00003 0.01293
Nov. 24, 2106 2,394.66 ±3.61 0.00003 0.01295
Nov. 25, 2103 6,079.74 ±3.41 0.00003 0.01293
Nov. 24, 2109 1,425.24 ±3.48 0.00003 0.01295
Nov. 24, 2109 918.06 ±2.98 0.00002 0.01293
Nov. 24, 2113 5,174.52 ±2.94 0.00002 0.01288
Nov. 24, 2119 1,977.36 ±3.38 0.00002 0.01292
Nov. 24, 2119 5,925.66 ±2.93 0.00002 0.01289
Nov. 24, 2111 950.16 ±2.47 0.00002 0.01292
Nov. 24, 2118 4,725.12 ±3.20 0.00002 0.01297
Nov. 24, 2108 4,185.84 ±3.85 0.00002 0.01291
Nov. 24, 2118 5,970.60 ±2.74 0.00002 0.01296
Nov. 24, 2114 680.52 ±2.63 0.00002 0.01293
Nov. 24, 2113 2,401.08 ±2.55 0.00002 0.01292
Nov. 24, 2115 1,598.58 ±2.71 0.00002 0.01294
Nov. 24, 2112 5,758.74 ±2.93 0.00002 0.01289
Nov. 24, 2116 1,797.60 ±2.81 0.00002 0.01293
Nov. 24, 2118 5,700.96 ±3.30 0.00002 0.01298
Nov. 24, 2118 4,827.84 ±3.03 0.00002 0.01298
Nov. 24, 2116 4,269.30 ±3.86 0.00002 0.01295
Nov. 24, 2108 1,797.60 ±3.62 0.00002 0.01294
Nov. 24, 2106 6,349.38 ±4.25 0.00002 0.01295
Nov. 24, 2114 5,347.86 ±2.90 0.00002 0.01289
Nov. 24, 2112 1,001.52 ±2.56 0.00001 0.01307
Nov. 24, 2117 590.64 ±3.55 0.00001 0.0129
Nov. 24, 2111 5,957.76 ±8.17 0.00001 0.01292
Nov. 24, 2098 5,720.22 ±3.55 0.00001 0.01304
Nov. 25, 2111 3,781.38 ±3.55 0.00000 0.01305
Nov. 24, 2098 404.46 ±3.80 0.00000 0.01306
Nov. 24, 2112 4,095.96 ±3.20 0.00000 0.01305
Nov. 25, 2115 1,919.58 ±3.72 0.00000 0.01309
Nov. 25, 2106 6,220.98 ±3.14 0.00000 0.01305
Nov. 24, 2082 6,163.20 ±3.60 0.00000 0.01305
Nov. 24, 2081 1,560.06 ±3.32 0.00000 0.01277
Nov. 24, 2117 6,413.58 ±5.15 0.00000 0.01296

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 26 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 7.407 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 102,524 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: 2459000.5 JD
  • Semi-major axis: 0.8999 AU
  • Eccentricity: 0.1309
  • Inclination: 5.77°
  • Longitude of Ascending Node: 243.06°
  • Argument of Periapsis: 35.89°
  • Mean Anomaly: 114.17°

Physical Characteristics

  • Diameter: ~0.116 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

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.