Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 6,156,719 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation


136795 (1997 BQ) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1997 BQ as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

1997 BQ orbits the sun every 843 days (2.31 years), coming as close as 0.91 AU and reaching as far as 2.58 AU from the sun. Based on its brightness and the way it reflects light, 1997 BQ is probably between 0.638 to 1.426 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

1997 BQ's spectral type None (Tholen) / S (SMASSII) indicates that it is likely to contain magnesium silicate and iron silicate.

Close Approaches

1997 BQ's orbit is 0.04 AU from Earth's orbit at its closest point. This means that there is an wide berth between this asteroid and Earth at all times.

1997 BQ has 8 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
May 21, 2020 6,156,719 11.676
May 31, 2050 16,217,102 13.670
March 12, 2057 25,317,831 10.249
April 6, 2087 21,028,598 10.035
May 8, 2117 10,386,396 10.290
May 28, 2147 9,497,371 12.296
March 7, 2154 26,404,167 10.755
April 5, 2184 21,091,068 10.081

Images and Observations

1997 BQ's orbit is determined by observations dating back to Jan. 16, 1997. It was last officially observed on July 10, 2020. The IAU Minor Planet Center records 341 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 1997 BQ:



   or view a random object

Orbital Elements

  • Epoch: 2459200.5 JD
  • Semi-major axis: 1.747 AU
  • Eccentricity: 0.4787
  • Inclination: 10.99°
  • Longitude of Ascending Node: 50.17°
  • Argument of Periapsis: 147.47°
  • Mean Anomaly: 103.25°

Physical Characteristics

  • Diameter: ~0.823 km
  • Magnitude: 18.1
  • Spectral type (SMASS): S

Derived Characteristics

  • Orbit Period: 843 days (2.31 years)
  • Avg. Orbit Speed: 22.55 km/s
  • Aphelion Distance: 2.58 AU
  • Perihelion Distance: 0.91 AU
  • Approx. Composition: magnesium silicate and iron silicate.

Map Comparison

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Orbit Simulation

Sky Map

The position of 136795 (1997 BQ) 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 above comparison is an artistic rendering that uses available data on the diameter of 1997 BQ to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.