164207 (2004 GU9)

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 164207 (2004 GU9)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a basketball court (0.16 km diameter)
  • Will pass within 29,672,346 km of Earth in 2026
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

164207 (2004 GU9) is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2004 GU9 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2004 GU9 orbits the sun every 366 days (1.00 years), coming as close as 0.86 AU and reaching as far as 1.14 AU from the sun. 2004 GU9 is about 0.2 kilometers in diameter, making it a small to average asteroid, comparable in size to a basketball court.

Close Approaches

2004 GU9'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.

2004 GU9 has 93 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Oct. 12, 2026 29,672,346 7.326
Oct. 14, 2027 28,358,790 7.308
Oct. 16, 2028 27,137,912 7.289
Oct. 18, 2029 26,014,955 7.272
Oct. 19, 2030 25,057,836 7.259
Oct. 20, 2031 24,272,565 7.252
Oct. 20, 2032 23,595,187 7.246
Oct. 21, 2033 23,061,827 7.244
Oct. 22, 2034 22,719,961 7.241
Oct. 22, 2035 22,656,877 7.241
Oct. 21, 2036 22,770,133 7.238
Oct. 21, 2037 23,072,757 7.237
Oct. 21, 2038 23,572,939 7.238
Oct. 21, 2039 24,258,705 7.239
Oct. 19, 2040 25,052,251 7.247
Oct. 18, 2041 25,995,021 7.256
Oct. 17, 2042 27,100,738 7.270
Oct. 15, 2043 28,403,829 7.291
Oct. 12, 2044 29,804,085 7.315
May 5, 2061 29,590,863 7.156
May 5, 2062 28,328,174 7.115
May 5, 2063 27,178,053 7.088
May 4, 2064 26,084,654 7.062
May 4, 2065 25,197,148 7.052
May 4, 2066 24,503,571 7.045
May 4, 2067 23,981,261 7.039
May 3, 2068 23,633,342 7.042
May 3, 2069 23,518,615 7.038
May 4, 2070 23,612,464 7.042
May 4, 2071 23,898,150 7.045
May 4, 2072 24,299,452 7.047
May 4, 2073 24,926,171 7.056
May 5, 2074 25,740,719 7.067
May 6, 2075 26,689,100 7.085
May 5, 2076 27,779,162 7.114
May 7, 2077 29,051,492 7.152
Oct. 20, 2094 29,364,750 7.269
Oct. 21, 2095 28,077,581 7.231
Oct. 22, 2096 26,840,005 7.192
Oct. 22, 2097 25,739,536 7.170
Oct. 23, 2098 24,815,017 7.156
Oct. 24, 2099 24,131,844 7.148
Oct. 24, 2100 23,638,262 7.142
Oct. 25, 2101 23,335,412 7.141
Oct. 25, 2102 23,261,204 7.137
Oct. 25, 2103 23,411,306 7.138
Oct. 24, 2104 23,664,790 7.139
Oct. 24, 2105 24,100,562 7.139
Oct. 25, 2106 24,752,768 7.150
Oct. 24, 2107 25,660,330 7.158
Oct. 23, 2108 26,729,916 7.180
Oct. 23, 2109 27,935,878 7.214
Oct. 23, 2110 29,282,673 7.253
May 13, 2128 28,681,127 7.190
May 11, 2129 27,441,464 7.171
May 10, 2130 26,341,618 7.156
May 10, 2131 25,366,992 7.146
May 8, 2132 24,531,836 7.140
May 7, 2133 23,916,675 7.136
May 7, 2134 23,480,704 7.139
May 7, 2135 23,197,575 7.137
May 6, 2136 23,075,227 7.139
May 7, 2137 23,165,161 7.141
May 7, 2138 23,462,033 7.142
May 8, 2139 23,920,392 7.147
May 8, 2140 24,512,991 7.149
May 9, 2141 25,322,963 7.160
May 11, 2142 26,295,755 7.170
May 13, 2143 27,401,778 7.189
May 14, 2144 28,614,584 7.205
Oct. 30, 2161 29,255,806 7.179
Oct. 30, 2162 27,944,084 7.148
Oct. 29, 2163 26,811,541 7.124
Oct. 28, 2164 25,806,304 7.100
Oct. 28, 2165 24,980,294 7.095
Oct. 28, 2166 24,349,309 7.085
Oct. 28, 2167 23,929,627 7.079
Oct. 28, 2168 23,626,480 7.081
Oct. 28, 2169 23,485,571 7.077
Oct. 28, 2170 23,582,425 7.079
Oct. 29, 2171 23,934,447 7.082
Oct. 28, 2172 24,460,764 7.083
Oct. 29, 2173 25,190,826 7.092
Oct. 30, 2174 26,095,212 7.104
Oct. 30, 2175 27,165,652 7.120
Oct. 31, 2176 28,299,092 7.148
Nov. 1, 2177 29,539,339 7.173
May 18, 2194 28,747,862 7.285
May 16, 2195 27,497,376 7.285
May 13, 2196 26,324,776 7.278
May 11, 2197 25,309,323 7.273
May 10, 2198 24,449,077 7.272
May 10, 2199 23,680,691 7.273

Images and Observations

2004 GU9's orbit is determined by observations dating back to May 11, 2001. It was last officially observed on April 24, 2023. The IAU Minor Planet Center records 311 observations used to determine its orbit.

Accessibility and Exploration

2004 GU9 can be reached with a journey of 362 days. This trajectory would require a delta-v of 10.74 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 7,671 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2004 GU9.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2004 GU9:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.001 AU
  • Eccentricity: 0.136
  • Inclination: 13.65°
  • Longitude of Ascending Node: 38.44°
  • Argument of Periapsis: 279.6°
  • Mean Anomaly: 29.98°

Physical Characteristics

  • Diameter: 0.16300 km
  • Magnitude: 21.19
  • Albedo: 0.219

Derived Characteristics

  • Orbit Period: 366 days (1.00 years)
  • Avg. Orbit Speed: 29.75 km/s
  • Aphelion Distance: 1.14 AU
  • Perihelion Distance: 0.86 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 164207 (2004 GU9) 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.

Size Rendering

The below comparison is an artistic rendering that uses available data on the diameter of 2004 GU9 to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.