Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 15,606,011 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

437844 (1999 MN) is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 1999 MN as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

1999 MN orbits the sun every 202 days (0.55 years), coming as close as 0.23 AU and reaching as far as 1.12 AU from the sun. Based on its brightness and the way it reflects light, 1999 MN is probably between 0.139 to 0.312 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

The rotation of 1999 MN has been observed. It completes a rotation on its axis every 5.50 hours.

Close Approaches

1999 MN's orbit is 0.01 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

1999 MN has 56 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 25, 2020 15,606,011 13.093
July 5, 2025 10,681,821 13.584
June 3, 2026 24,168,703 20.579
July 11, 2030 2,519,410 15.341
June 2, 2031 8,938,111 17.132
July 12, 2035 15,000,625 18.457
June 3, 2036 4,749,949 14.428
June 14, 2041 14,286,416 13.167
June 27, 2046 15,172,501 13.121
July 9, 2051 5,929,884 14.313
June 1, 2052 15,528,155 18.599
July 12, 2056 11,441,296 17.656
June 3, 2057 2,385,740 14.861
June 16, 2062 14,713,886 13.136
July 3, 2067 12,568,042 13.355
June 3, 2068 26,992,839 21.245
July 11, 2072 3,898,390 15.914
June 2, 2073 4,682,256 16.210
July 10, 2077 25,726,504 20.956
June 10, 2078 11,925,461 13.408
June 28, 2083 14,934,991 13.117
July 10, 2088 3,559,499 14.807
June 1, 2089 11,321,148 17.639
July 12, 2093 16,810,234 18.878
June 5, 2094 6,598,459 14.102
June 21, 2099 15,607,975 13.079
July 7, 2104 9,505,381 13.719
June 3, 2105 20,796,836 19.783
July 13, 2109 9,013,827 17.090
June 4, 2110 1,015,679 15.139
June 21, 2115 15,377,880 13.101
July 9, 2120 6,735,062 14.162
June 3, 2121 15,143,417 18.495
July 13, 2125 18,407,062 19.230
June 8, 2126 8,411,526 13.825
June 30, 2131 14,398,683 13.170
July 13, 2136 7,133,228 16.636
June 4, 2137 825,585 15.211
June 25, 2142 15,340,129 13.104
July 13, 2147 5,462,524 16.215
June 3, 2148 1,265,322 15.454
June 23, 2153 15,448,089 13.087
July 13, 2158 2,964,493 15.345
June 4, 2159 5,705,715 16.385
June 19, 2164 15,065,189 13.107
July 12, 2169 3,773,638 14.804
June 3, 2170 9,182,616 17.139
June 16, 2175 13,968,296 13.188
July 9, 2180 7,283,904 14.063
June 3, 2181 14,979,158 18.432
July 12, 2185 23,893,260 20.479
June 12, 2186 11,731,588 13.397
July 7, 2191 10,488,951 13.571
June 4, 2192 20,654,060 19.730
July 13, 2196 18,725,185 19.273
June 9, 2197 9,077,977 13.717

Images and Observations

1999 MN's orbit is determined by observations dating back to June 22, 1999. It was last officially observed on July 9, 2020. The IAU Minor Planet Center records 159 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 1999 MN:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.6738 AU
  • Eccentricity: 0.6655
  • Inclination: 2.02°
  • Longitude of Ascending Node: 80.89°
  • Argument of Periapsis: 9.73°
  • Mean Anomaly: 144.77°

Physical Characteristics

  • Diameter: ~0.180 km
  • Magnitude: 21.4

Derived Characteristics

  • Orbit Period: 202 days (0.55 years)
  • Avg. Orbit Speed: 36.29 km/s
  • Aphelion Distance: 1.12 AU
  • Perihelion Distance: 0.23 AU
  • Rotation Period: 5.50 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 437844 (1999 MN) 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 1999 MN 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.