2021 JE1

Very small Apollo-class Asteroid

Near-Earth
Space Reference » Apollo-class Asteroids » 2021 JE1

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 28,728,983 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2021 JE1 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2021 JE1 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.

2021 JE1 orbits the sun every 379 days (1.04 years), coming as close as 0.76 AU and reaching as far as 1.29 AU from the sun. Based on its brightness and the way it reflects light, 2021 JE1 is probably between 0.008 to 0.036 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2021 JE1's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.

2021 JE1 has 8 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
May 11, 2020 28,728,983 13.875
May 20, 2021 2,844,588 7.632
Dec. 8, 2025 5,172,721 7.127
Dec. 18, 2026 29,017,916 14.090
May 15, 2049 16,806,802 11.474
May 22, 2050 15,701,943 5.119
Oct. 21, 2053 29,537,778 6.557
Dec. 10, 2054 109,333 8.589

NASA Sentry has assessed impact risk for 79 very close approach scenarios. Here are the top scenarios ordered by probability of impact:

Date Probability of Impact (%) Impact Energy (Mt)
June 3, 2064 0.00164 0.1177
Dec. 12, 2102 0.00077 0.1175
Dec. 11, 2113 0.00030 0.1184
Dec. 10, 2089 0.00026 0.1177
Dec. 11, 2104 0.00024 0.1177
June 5, 2109 0.00022 0.1173
Dec. 10, 2089 0.00018 0.1177
Dec. 12, 2103 0.00017 0.1179
Dec. 12, 2111 0.00016 0.1177
Dec. 11, 2104 0.00015 0.1176
June 4, 2075 0.00011 0.1176
Dec. 10, 2096 0.00010 0.1175
Dec. 10, 2073 0.00010 0.1176
Dec. 11, 2114 0.00008 0.1184
Dec. 9, 2083 0.00008 0.1177
Dec. 10, 2108 0.00007 0.1185
Dec. 11, 2105 0.00006 0.1178
Dec. 9, 2083 0.00006 0.1176
Dec. 12, 2108 0.00006 0.1173
Dec. 12, 2114 0.00006 0.1172
Dec. 10, 2108 0.00006 0.1186
Dec. 10, 2085 0.00005 0.1175
Dec. 9, 2116 0.00005 0.1176
Dec. 10, 2089 0.00005 0.1176
Dec. 10, 2089 0.00004 0.1175
Dec. 11, 2112 0.00004 0.1176
Dec. 10, 2116 0.00004 0.118
Dec. 11, 2112 0.00004 0.1181
Dec. 11, 2100 0.00004 0.1178
Dec. 12, 2090 0.00004 0.1174
Dec. 11, 2115 0.00003 0.1182
Dec. 12, 2108 0.00003 0.1177
Dec. 12, 2118 0.00003 0.1179
June 7, 2120 0.00003 0.1172
Dec. 11, 2121 0.00003 0.1178
June 5, 2119 0.00003 0.1175
Dec. 12, 2106 0.00002 0.1175
Dec. 7, 2120 0.00002 0.1176
Dec. 11, 2121 0.00002 0.118
Dec. 11, 2098 0.00002 0.1175
June 4, 2119 0.00002 0.1175
Dec. 12, 2103 0.00002 0.1182
Dec. 11, 2090 0.00002 0.1172
June 5, 2109 0.00002 0.1175
Dec. 10, 2090 0.00002 0.1178
June 4, 2096 0.00002 0.1175
Dec. 12, 2121 0.00001 0.1177
Dec. 12, 2102 0.00001 0.1177
Dec. 12, 2121 0.00001 0.1176
Dec. 11, 2104 0.00001 0.1175
Dec. 11, 2120 0.00001 0.1175
Dec. 10, 2114 0.00001 0.1187
Dec. 12, 2118 0.00001 0.1181
June 6, 2110 0.00001 0.1175
Dec. 12, 2117 0.00001 0.1174
June 5, 2121 0.00001 0.1177
Dec. 10, 2102 0.00001 0.1176
Dec. 11, 2073 0.00001 0.1177
Dec. 2, 2076 0.00001 0.1176
Dec. 10, 2087 0.00001 0.1176
Dec. 13, 2103 0.00001 0.1174
June 4, 2087 0.00001 0.1172
Dec. 13, 2121 0.00001 0.1177
June 6, 2110 0.00001 0.1174
June 6, 2099 0.00001 0.1173
Dec. 7, 2120 0.00001 0.1175
Dec. 12, 2110 0.00001 0.1181
June 14, 2107 0.00001 0.1175
Dec. 8, 2078 0.00001 0.1174
Dec. 10, 2117 0.00001 0.1173
Dec. 11, 2108 0.00001 0.1178
Dec. 12, 2115 0.00001 0.1177
Dec. 11, 2105 0.00001 0.1179
Dec. 12, 2121 0.00001 0.1171
June 3, 2077 0.00001 0.1176
Dec. 5, 2094 0.00000 0.1174
Dec. 10, 2089 0.00000 0.1172
Dec. 10, 2120 0.00000 0.1169
Dec. 11, 2119 0.00000 0.1178

Images and Observations

2021 JE1's orbit is determined by observations dating back to May 3, 2021. It was last officially observed on May 20, 2021. The IAU Minor Planet Center records 65 observations used to determine its orbit.

Accessibility and Exploration

2021 JE1 can be reached with a journey of 378 days. This trajectory would require a delta-v of 7.961 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 142,947 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2021 JE1.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2021 JE1:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.025 AU
  • Eccentricity: 0.2614
  • Inclination: 1.03°
  • Longitude of Ascending Node: 76.2°
  • Argument of Periapsis: 265.17°
  • Mean Anomaly: 10.53°

Physical Characteristics

  • Diameter: ~0.022 km
  • Magnitude: 26.68

Derived Characteristics

  • Orbit Period: 379 days (1.04 years)
  • Avg. Orbit Speed: 29.42 km/s
  • Aphelion Distance: 1.29 AU
  • Perihelion Distance: 0.76 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2021 JE1 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.