Key Facts
- Categorized as a Aten-class Asteroid
- Comparable in size to a school bus or smaller
- Will pass within 3,201,741 km of Earth in 2019
- Classified as a Near Earth Asteroid (NEA)
- Not a Potentially Hazardous Object
- See orbit simulation
Overview
2019 HM is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2019 HM 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.
2019 HM orbits the sun every 358 days (0.98 years), coming as close as 0.98 AU and reaching as far as 1.00 AU from the sun. Based on its brightness and the way it reflects light, 2019 HM is probably between 0.011 to 0.051 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
Close Approaches
2019 HM's orbit is 0.01 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.
2019 HM has 29 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| April 13, 2019 | 3,201,741 | 3.007 |
| Oct. 11, 2019 | 7,789,625 | 3.198 |
| April 10, 2020 | 2,776,062 | 3.173 |
| Sept. 4, 2020 | 18,632,365 | 3.895 |
| April 4, 2021 | 20,021,179 | 5.337 |
| Nov. 8, 2064 | 21,924,302 | 5.552 |
| April 23, 2065 | 21,596,268 | 4.855 |
| Oct. 21, 2065 | 5,256,645 | 3.309 |
| April 11, 2066 | 6,861,256 | 3.124 |
| Oct. 7, 2066 | 6,659,452 | 3.131 |
| April 9, 2067 | 3,904,308 | 3.249 |
| April 3, 2068 | 23,741,401 | 5.979 |
| Nov. 10, 2107 | 19,226,041 | 5.048 |
| April 16, 2108 | 18,518,289 | 4.428 |
| Oct. 16, 2108 | 3,229,983 | 3.125 |
| April 9, 2109 | 2,220,871 | 3.017 |
| Oct. 4, 2109 | 10,992,426 | 3.419 |
| April 6, 2110 | 5,758,057 | 3.409 |
| March 31, 2111 | 19,903,917 | 5.369 |
| Oct. 29, 2162 | 19,327,362 | 5.220 |
| April 23, 2163 | 21,802,434 | 4.806 |
| Oct. 18, 2163 | 5,620,419 | 3.376 |
| April 8, 2164 | 10,594,066 | 3.384 |
| Oct. 9, 2164 | 2,970,216 | 3.022 |
| April 6, 2165 | 1,958,657 | 3.047 |
| Oct. 10, 2165 | 9,757,049 | 3.329 |
| March 31, 2166 | 4,803,628 | 3.295 |
| Sept. 29, 2166 | 19,407,758 | 4.526 |
| March 21, 2167 | 17,403,700 | 4.882 |
Images and Observations
2019 HM's orbit is determined by observations dating back to April 22, 2019. It was last officially observed on Sept. 27, 2019. The IAU Minor Planet Center records 35 observations used to determine its orbit.
Accessibility and Exploration
2019 HM can be reached with a journey of 370 days. This trajectory would require a delta-v of 4.41 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 493,344 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for 2019 HM.
Similar Objects
These objects have orbits that share similar characteristics to the orbit of 2019 HM:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 0.9858 AU
- Eccentricity: 0.0097
- Inclination: 5.76°
- Longitude of Ascending Node: 201.52°
- Argument of Periapsis: 195.1°
- Mean Anomaly: 342.72°
Physical Characteristics
- Diameter: ~0.031 km
- Magnitude: 25.9
Derived Characteristics
- Orbit Period: 358 days (0.98 years)
- Avg. Orbit Speed: 29.96 km/s
- Aphelion Distance: 1.00 AU
- Perihelion Distance: 0.98 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2019 HM 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 below comparison is an artistic rendering that uses available data on the diameter of 2019 HM to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.
