2008 ST is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2008 ST 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.
2008 ST orbits the sun every 346 days (0.95 years), coming as close as 0.84 AU and reaching as far as 1.09 AU from the sun. Based on its brightness and the way it reflects light, 2008 ST is probably between 0.007 to 0.030 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
2008 ST's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.
2008 ST has 6 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| May 20, 2025 | 5,184,927 | 2.533 |
| Jan. 5, 2026 | 21,228,100 | 4.071 |
| Sept. 26, 2026 | 14,879,142 | 6.164 |
| Sept. 25, 2043 | 18,129,529 | 6.829 |
| May 21, 2058 | 15,506,508 | 6.157 |
| Sept. 25, 2059 | 1,586,612 | 3.033 |
NASA Sentry has assessed impact risk for 64 very close approach scenarios. Here are the top scenarios ordered by probability of impact:
| Date | Probability of Impact (%) | Impact Energy (Mt) |
|---|---|---|
| Sept. 25, 2116 | 0.00649 | 0.04787 |
| Sept. 24, 2080 | 0.00242 | 0.04775 |
| Sept. 26, 2106 | 0.00105 | 0.04779 |
| Sept. 25, 2122 | 0.00051 | 0.04792 |
| Sept. 25, 2103 | 0.00050 | 0.04779 |
| Sept. 24, 2106 | 0.00040 | 0.04786 |
| Sept. 25, 2101 | 0.00039 | 0.04785 |
| Sept. 28, 2057 | 0.00020 | 0.04748 |
| Sept. 25, 2100 | 0.00019 | 0.048 |
| Sept. 24, 2122 | 0.00014 | 0.04781 |
| Sept. 25, 2117 | 0.00011 | 0.04791 |
| Sept. 24, 2116 | 0.00011 | 0.04777 |
| Sept. 24, 2107 | 0.00008 | 0.04774 |
| Sept. 24, 2116 | 0.00008 | 0.04781 |
| Sept. 25, 2078 | 0.00007 | 0.04778 |
| Sept. 26, 2104 | 0.00007 | 0.04794 |
| Sept. 27, 2056 | 0.00006 | 0.04752 |
| Sept. 24, 2100 | 0.00006 | 0.04774 |
| Sept. 25, 2101 | 0.00006 | 0.04764 |
| March 5, 2096 | 0.00005 | 0.04771 |
| Sept. 24, 2116 | 0.00005 | 0.04791 |
| Sept. 26, 2105 | 0.00004 | 0.04774 |
| Sept. 26, 2103 | 0.00004 | 0.04796 |
| Sept. 24, 2097 | 0.00004 | 0.04772 |
| Sept. 25, 2119 | 0.00004 | 0.04776 |
| Sept. 24, 2109 | 0.00004 | 0.04779 |
| Sept. 24, 2109 | 0.00003 | 0.04775 |
| Sept. 25, 2110 | 0.00003 | 0.04777 |
| Sept. 25, 2104 | 0.00003 | 0.04768 |
| Sept. 25, 2102 | 0.00003 | 0.04736 |
| Sept. 25, 2115 | 0.00002 | 0.04786 |
| Sept. 23, 2096 | 0.00002 | 0.04775 |
| Sept. 24, 2101 | 0.00002 | 0.04784 |
| Sept. 27, 2072 | 0.00002 | 0.04751 |
| Sept. 26, 2093 | 0.00002 | 0.0474 |
| Sept. 27, 2072 | 0.00002 | 0.04746 |
| Sept. 24, 2103 | 0.00002 | 0.04778 |
| Sept. 25, 2114 | 0.00002 | 0.04791 |
| Sept. 24, 2095 | 0.00001 | 0.04779 |
| Sept. 24, 2113 | 0.00001 | 0.04777 |
| Sept. 28, 2053 | 0.00001 | 0.0475 |
| Sept. 23, 2114 | 0.00001 | 0.04782 |
| Sept. 23, 2081 | 0.00001 | 0.04784 |
| Sept. 27, 2060 | 0.00001 | 0.04741 |
| Sept. 27, 2052 | 0.00001 | 0.04746 |
| Sept. 24, 2119 | 0.00001 | 0.04785 |
| Sept. 25, 2120 | 0.00001 | 0.0477 |
| Sept. 27, 2070 | 0.00001 | 0.04753 |
| Sept. 25, 2117 | 0.00001 | 0.04785 |
| Sept. 24, 2119 | 0.00001 | 0.04765 |
| Sept. 25, 2117 | 0.00000 | 0.04791 |
| March 21, 2106 | 0.00000 | 0.04782 |
| July 26, 2082 | 0.00000 | 0.04783 |
| Sept. 25, 2091 | 0.00000 | 0.04783 |
| Sept. 26, 2118 | 0.00000 | 0.04793 |
| Sept. 25, 2116 | 0.00000 | 0.04793 |
| Sept. 25, 2102 | 0.00000 | 0.04784 |
| Sept. 25, 2115 | 0.00000 | 0.0479 |
| Sept. 28, 2071 | 0.00000 | 0.04752 |
| Sept. 25, 2113 | 0.00000 | 0.0479 |
| March 24, 2048 | 0.00000 | 0.04749 |
| Sept. 27, 2073 | 0.00000 | 0.0475 |
| Sept. 25, 2105 | 0.00000 | 0.04792 |
| Sept. 26, 2119 | 0.00000 | 0.0482 |
2008 ST's orbit is determined by observations dating back to Sept. 22, 2008. It was last officially observed on Sept. 29, 2008. The IAU Minor Planet Center records 49 observations used to determine its orbit.
2008 ST can be reached with a journey of 370 days. This trajectory would require a delta-v of 4.998 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 1,267,720 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for 2008 ST.
The position of 2008 ST 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.