Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a football field
  • 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 0.157 to 0.350 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

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 24,168,704 20.579
July 11, 2030 2,519,410 15.341
June 2, 2031 8,938,113 17.132
July 12, 2035 15,000,622 18.457
June 3, 2036 4,749,947 14.428
June 14, 2041 14,286,415 13.167
June 27, 2046 15,172,501 13.121
July 9, 2051 5,929,885 14.313
June 1, 2052 15,528,156 18.599
July 12, 2056 11,441,296 17.656
June 3, 2057 2,385,741 14.861
June 16, 2062 14,713,886 13.136
July 3, 2067 12,568,041 13.355
June 3, 2068 26,992,836 21.245
July 11, 2072 3,898,392 15.914
June 2, 2073 4,682,253 16.210
July 10, 2077 25,726,505 20.956
June 10, 2078 11,925,462 13.408
June 28, 2083 14,934,991 13.117
July 10, 2088 3,559,500 14.807
June 1, 2089 11,321,150 17.639
July 12, 2093 16,810,230 18.878
June 5, 2094 6,598,456 14.102
June 21, 2099 15,607,975 13.079
July 7, 2104 9,505,382 13.719
June 3, 2105 20,796,838 19.783
July 13, 2109 9,013,826 17.090
June 4, 2110 1,015,678 15.139
June 21, 2115 15,377,880 13.101
July 9, 2120 6,735,062 14.162
June 3, 2121 15,143,418 18.495
July 13, 2125 18,407,061 19.230
June 8, 2126 8,411,525 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 15,340,130 13.104
July 13, 2147 5,462,515 16.215
June 3, 2148 1,265,331 15.454
June 23, 2153 15,448,089 13.087
July 13, 2158 2,964,496 15.345
June 4, 2159 5,705,671 16.385
June 19, 2164 15,065,198 13.107
July 12, 2169 3,773,605 14.804
June 3, 2170 9,182,552 17.139
June 16, 2175 13,968,315 13.188
July 9, 2180 7,283,860 14.063
June 3, 2181 14,979,087 18.432
July 12, 2185 23,893,313 20.479
June 12, 2186 11,731,611 13.397
July 7, 2191 10,488,945 13.571
June 4, 2192 20,654,053 19.730
July 13, 2196 18,725,160 19.273
June 9, 2197 9,077,959 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: 2459396.5 JD
  • Semi-major axis: 0.6739 AU
  • Eccentricity: 0.6654
  • Inclination: 2.02°
  • Longitude of Ascending Node: 80.88°
  • Argument of Periapsis: 9.74°
  • Mean Anomaly: 130.38°

Physical Characteristics

  • Diameter: ~0.202 km
  • Magnitude: 21.15

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.