Key Facts
- Categorized as a Amor-class Asteroid
- Comparable in size to the island of Manhattan (4.30 km diameter)
- Classified as a Near Earth Asteroid (NEA)
- Not a Potentially Hazardous Object
- See orbit simulation
Overview
5646 (1990 TR) is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 1990 TR 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.
1990 TR orbits the sun every 1,150 days (3.15 years), coming as close as 1.21 AU and reaching as far as 3.08 AU from the sun. 1990 TR is about 4.3 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the island of Manhattan.
The rotation of 1990 TR has been observed. It completes a rotation on its axis every 3.20 hours.
No Close Approaches
1990 TR's orbit is 0.21 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.
Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.
Images and Observations
1990 TR's orbit is determined by observations dating back to May 3, 1990. It was last officially observed on March 19, 2023. The IAU Minor Planet Center records 2,329 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 1990 TR:References
Search
or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 2.144 AU
- Eccentricity: 0.4359
- Inclination: 7.91°
- Longitude of Ascending Node: 14.11°
- Argument of Periapsis: 335.77°
- Mean Anomaly: 189.38°
Physical Characteristics
- Diameter: 4.30000 km
- Magnitude: 15.51
- Albedo: 0.223
- Spectral type (SMASS): U
Derived Characteristics
- Orbit Period: 1,150 days (3.15 years)
- Avg. Orbit Speed: 20.28 km/s
- Aphelion Distance: 3.08 AU
- Perihelion Distance: 1.21 AU
- Rotation Period: 3.20 hours
Map Comparison
Orbit Simulation
Sky Map
The position of 5646 (1990 TR) 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 1990 TR 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.
