Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to Mount Everest (1.60 km diameter)
- Will pass within 21,755,237 km of Earth in 2021
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
7822 (1991 CS) is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1991 CS as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
1991 CS orbits the sun every 435 days (1.19 years), coming as close as 0.94 AU and reaching as far as 1.31 AU from the sun. 1991 CS is about 1.6 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to Mount Everest.
The rotation of 1991 CS has been observed. It completes a rotation on its axis every 2.39 hours.
1991 CS's spectral type None (Tholen) / S (SMASSII) indicates that it is likely to contain and .
Close Approaches
1991 CS's orbit is 0.02 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.
1991 CS has 16 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Aug. 25, 2021 | 21,755,237 | 20.711 |
| Sept. 1, 2040 | 9,590,716 | 19.120 |
| Feb. 22, 2041 | 25,499,225 | 18.616 |
| Aug. 31, 2065 | 3,737,408 | 19.358 |
| Feb. 23, 2066 | 28,135,646 | 18.469 |
| Sept. 1, 2090 | 5,845,129 | 19.235 |
| Feb. 23, 2091 | 26,956,797 | 18.521 |
| Sept. 5, 2115 | 20,343,877 | 18.938 |
| Feb. 24, 2116 | 24,787,512 | 18.964 |
| Aug. 28, 2121 | 17,808,858 | 20.409 |
| Feb. 24, 2141 | 29,705,151 | 19.715 |
| Aug. 31, 2146 | 4,294,425 | 19.540 |
| Sept. 1, 2171 | 3,692,393 | 19.488 |
| Feb. 25, 2172 | 29,912,411 | 18.413 |
| Feb. 24, 2191 | 27,687,730 | 19.533 |
| Aug. 29, 2196 | 11,914,559 | 20.005 |
Images and Observations
1991 CS's orbit is determined by observations dating back to Jan. 19, 1991. It was last officially observed on June 25, 2023. The IAU Minor Planet Center records 3,871 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 1991 CS:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 1.123 AU
- Eccentricity: 0.1646
- Inclination: 37.12°
- Longitude of Ascending Node: 156.85°
- Argument of Periapsis: 249.45°
- Mean Anomaly: 210.93°
Physical Characteristics
- Diameter: 1.60200 km
- Magnitude: 17.34
- Albedo: 0.075
- Spectral type (SMASS): S
Derived Characteristics
- Orbit Period: 435 days (1.19 years)
- Avg. Orbit Speed: 28.09 km/s
- Aphelion Distance: 1.31 AU
- Perihelion Distance: 0.94 AU
- Rotation Period: 2.39 hours
- Approx. Composition: and .
Map Comparison
Orbit Simulation
Sky Map
The position of 7822 (1991 CS) 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 1991 CS 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.
