Key Facts

  • Categorized as a Amor-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 11,928,220 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation


2011 HT is a very small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2011 HT 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.

2011 HT orbits the sun every 977 days (2.67 years), coming as close as 1.06 AU and reaching as far as 2.79 AU from the sun. Based on its brightness and the way it reflects light, 2011 HT is probably between 0.111 to 0.248 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2011 HT's orbit is 0.05 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.

2011 HT has 5 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 25, 2019 11,928,220 7.922
June 3, 2086 10,626,841 6.815
June 28, 2094 14,424,845 8.329
May 25, 2161 15,448,651 7.628
June 22, 2169 9,063,537 7.249

Images and Observations

2011 HT's orbit is determined by observations dating back to April 25, 2011. It was last officially observed on Aug. 1, 2019. The IAU Minor Planet Center records 168 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 2011 HT:



   or view a random object

Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 1.92659005073 AU
  • Eccentricity: 0.450176797485
  • Inclination: 7.10530969727°
  • Longitude of Ascending Node: 90.1393702524°
  • Argument of Periapsis: 163.550723259°
  • Mean Anomaly: 343.750679297°

Physical Characteristics

  • Diameter: ~0.143 km
  • Magnitude: 21.9

Derived Characteristics

  • Orbit Period: 977 days (2.67 years)
  • Avg. Orbit Speed: 21.46 km/s
  • Aphelion Distance: 2.79 AU
  • Perihelion Distance: 1.06 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2011 HT 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.