Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the U.S. Pentagon
  • Will pass within 17,952,737 km of Earth in 2024
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

Bacchus is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Bacchus 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 future collision.

Bacchus orbits the sun every 409 days (1.12 years), coming as close as 0.70 AU and reaching as far as 1.45 AU from the sun. Based on its brightness and the way it reflects light, Bacchus is probably between 0.922 to 2.061 kilometers in diameter, making it larger than most asteroids, very roughly comparable in size to the U.S. Pentagon.

The rotation of Bacchus has been observed. It completes a rotation on its axis every 14.90 days.

Bacchus's spectral type (Tholen) / Sq (SMASSII) indicates that it is likely to contain magnesium silicate and iron silicate.

Close Approaches

Bacchus's orbit is 0.07 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.

Bacchus has 20 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
March 31, 2024 17,952,737 8.527
Sept. 14, 2031 18,889,836 12.763
April 1, 2043 10,571,221 10.343
Sept. 17, 2050 16,387,261 11.641
April 1, 2062 10,537,949 10.331
Sept. 16, 2069 17,159,408 12.116
March 31, 2081 10,649,695 10.249
Sept. 16, 2088 16,542,610 11.808
April 1, 2100 10,148,511 10.482
Sept. 18, 2107 16,822,983 11.991
April 2, 2119 14,809,334 9.073
Sept. 12, 2126 24,689,825 14.439
Oct. 19, 2136 29,148,711 8.947
April 6, 2138 26,349,580 7.560
April 7, 2148 24,909,695 15.295
Oct. 2, 2155 20,692,024 8.998
April 5, 2167 13,509,528 12.768
Sept. 26, 2174 16,980,978 9.865
April 4, 2186 13,009,774 12.648
Sept. 26, 2193 17,311,464 9.714

Images and Observations

Bacchus's orbit is determined by observations dating back to April 24, 1977. It was last officially observed on May 31, 2016. The IAU Minor Planet Center records 678 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 Bacchus:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 1.07788529391 AU
  • Eccentricity: 0.349474856565
  • Inclination: 9.43224901507°
  • Longitude of Ascending Node: 33.0969183585°
  • Argument of Periapsis: 55.3294278105°
  • Mean Anomaly: 281.545985161°

Physical Characteristics

  • Diameter: ~1.190 km
  • Magnitude: 17.3
  • Spectral type (SMASS): Sq

Derived Characteristics

  • Orbit Period: 409 days (1.12 years)
  • Avg. Orbit Speed: 28.69 km/s
  • Aphelion Distance: 1.45 AU
  • Perihelion Distance: 0.70 AU
  • Rotation Period: 14.90 days
  • Approx. Composition: magnesium silicate and iron silicate.

Size Comparison

Orbit Simulation

Sky Map

The position of Bacchus 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.