Key Facts

  • Classified as a Aten-class Asteroid
  • Comparable in size to a school bus
  • Will pass within 65,616,936 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2008 SD85 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2008 SD85 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 collision.

2008 SD85 orbits the sun every 303 days (0.83 years), coming as close as 0.52 AU and reaching as far as 1.24 AU from the sun. Based on its brightness and the way it reflects light, 2008 SD85 is probably between 0.07 to 0.16 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus.

Close Approaches

2008 SD85's orbit is 0.10 AU from Earth's orbit at its closest point. This means that there is a wide berth between this asteroid and Earth at all times.

2008 SD85 has 98 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
March 15, 2019 65,616,936 22.215
Oct. 13, 2023 47,786,209 13.277
March 1, 2024 62,606,571 20.716
Sept. 22, 2027 56,804,854 24.903
Oct. 24, 2028 54,172,251 13.116
Feb. 15, 2029 60,153,013 18.779
Sept. 18, 2032 39,005,941 21.234
Nov. 8, 2033 58,142,999 12.622
Jan. 29, 2034 58,486,692 16.554
Sept. 15, 2037 23,350,475 18.004
Jan. 9, 2039 57,952,346 14.449
Sept. 16, 2042 15,051,641 15.435
April 18, 2043 74,208,104 23.746
Dec. 21, 2043 59,996,093 15.453
Sept. 20, 2047 21,356,198 13.894
April 5, 2048 71,030,317 23.610
Dec. 11, 2048 67,116,399 19.195
Sept. 26, 2052 32,505,406 13.348
March 23, 2053 67,700,296 22.914
Oct. 6, 2057 42,484,922 13.272
March 10, 2058 64,473,778 21.735
Sept. 25, 2061 68,510,048 27.396
Oct. 17, 2062 50,424,827 13.225
Feb. 25, 2063 61,603,316 20.052
Sept. 21, 2066 50,272,441 23.575
Oct. 30, 2067 55,955,703 12.983
Feb. 10, 2068 59,388,027 18.009
Sept. 17, 2071 32,939,288 20.007
Nov. 14, 2072 59,025,058 12.310
Jan. 23, 2073 58,098,283 15.760
Sept. 15, 2076 18,841,688 16.964
Jan. 1, 2078 58,199,629 14.199
Sept. 16, 2081 15,860,803 14.744
April 13, 2082 73,104,749 23.769
Dec. 17, 2082 61,954,043 16.735
Sept. 22, 2086 25,276,499 13.583
April 1, 2087 69,835,272 23.409
Dec. 10, 2087 70,779,216 20.635
Sept. 30, 2091 36,296,026 13.276
March 19, 2092 66,503,558 22.547
Oct. 9, 2096 45,697,411 13.270
March 5, 2097 63,345,831 21.169
Sept. 24, 2100 61,792,671 25.974
Oct. 22, 2101 52,796,959 13.183
Feb. 20, 2102 60,680,969 19.352
Sept. 20, 2105 43,748,959 22.236
Nov. 5, 2106 57,444,300 12.790
Feb. 5, 2107 58,769,808 17.216
Sept. 17, 2110 27,230,483 18.864
Nov. 25, 2111 59,520,403 11.816
Jan. 17, 2112 57,898,484 15.011
Sept. 17, 2115 15,716,814 16.045
Dec. 26, 2116 58,977,963 14.718
Sept. 19, 2120 18,520,513 14.197
April 10, 2121 71,938,475 23.691
Dec. 15, 2121 64,674,440 18.130
Sept. 25, 2125 29,428,975 13.417
March 28, 2126 68,615,660 23.149
Oct. 4, 2130 40,013,410 13.275
March 16, 2131 65,305,275 22.103
Sept. 28, 2134 73,359,222 28.453
Oct. 15, 2135 48,657,385 13.249
March 1, 2136 62,279,861 20.544
Sept. 23, 2139 55,065,991 24.588
Oct. 27, 2140 54,856,501 13.061
Feb. 15, 2141 59,841,078 18.607
Sept. 19, 2144 37,427,305 20.947
Nov. 11, 2145 58,578,563 12.546
Jan. 29, 2146 58,274,148 16.405
Sept. 17, 2149 21,931,872 17.738
Jan. 9, 2151 57,921,820 14.438
Sept. 17, 2154 14,815,404 15.239
April 18, 2155 73,958,834 23.749
Dec. 22, 2155 60,462,776 15.849
Sept. 21, 2159 22,339,068 13.788
April 5, 2160 70,733,358 23.546
Dec. 12, 2160 68,071,981 19.610
Sept. 28, 2164 33,557,496 13.302
March 24, 2165 67,362,634 22.822
Oct. 8, 2169 43,576,303 13.254
March 11, 2170 64,086,671 21.561
Sept. 26, 2173 66,430,772 26.971
Oct. 20, 2174 51,342,389 13.211
Feb. 25, 2175 61,223,085 19.850
Sept. 22, 2178 48,186,047 23.177
Nov. 2, 2179 56,638,597 12.921
Feb. 10, 2180 59,077,746 17.798
Sept. 19, 2183 31,057,711 19.685
Nov. 18, 2184 59,399,875 12.132
Jan. 22, 2185 57,928,870 15.579
Sept. 16, 2188 17,392,150 16.658
Dec. 31, 2189 58,367,265 14.398
Sept. 18, 2193 16,399,658 14.541
April 13, 2194 72,753,611 23.731
Dec. 18, 2194 62,809,428 17.233
Sept. 24, 2198 26,620,154 13.509
April 1, 2199 69,430,561 23.322
Dec. 11, 2199 72,156,939 21.161

Images and Observations

2008 SD85's orbit is determined by observations dating back to Sept. 28, 2008. It was last officially observed on Sept. 30, 2013. The IAU Minor Planet Center records 39 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 2008 SD85:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 0.88289319087 AU
  • Eccentricity: 0.407253652257
  • Inclination: 23.3713150225°
  • Longitude of Ascending Node: 2.52294255983°
  • Argument of Periapsis: 209.138375227°
  • Mean Anomaly: 32.1084093233°

Physical Characteristics

  • Diameter: ~0.09 km
  • Magnitude: 22.9

Derived Characteristics

  • Orbit Period: 303 days (0.83 years)
  • Avg. Orbit Speed: 31.70 km/s
  • Aphelion Distance: 1.24 AU
  • Perihelion Distance: 0.52 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2008 SD85 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.