2019 SU3 is a very small near-Earth asteroid of the Apollo group, first observed by the Asteroid Terrestrial-impact Last Alert System at Haleakala Observatory on 23 September 2019. It was briefly listed on the Risk List of the European Space Agency. With a 18-day observation arc, the nominal orbit passes 0.02 AU (3,000,000 km; 1,900,000 mi) from Earth on 27 September 2084.[2] It was removed from the Sentry Risk Table on 12 October 2019.
Discovery [1][2] | |
---|---|
Discovered by | ATLAS-HKO |
Discovery site | Haleakala Obs. |
Discovery date | 23 September 2019 (first observed only) |
Designations | |
MPC designation | 2019 SU3 |
Minor planet category | NEO · Apollo [1][2] |
Orbital characteristics [2] | |
Epoch 27 April 2019 (JD 2458600.5) | |
Uncertainty parameter 2[2] · 3[1] | |
Observation arc | 28 days |
Aphelion | 1.1948 AU |
Perihelion | 0.9922 AU |
Semi-major axis | 1.0935 AU |
Eccentricity | 0.0927 |
Orbital period (sidereal) | 1.14 yr (418 d) |
Mean anomaly | 257.62° |
Mean motion | 0° 51m 42.84s / day |
Inclination | 1.1621° |
Longitude of ascending node | 5.1182° |
Argument of perihelion | 322.69° |
Earth MOID | 0.0022 AU (0.86 LD) |
Physical characteristics | |
Mean diameter | 15 m[3][4] |
Absolute magnitude (H) | 27.2[1] 27.28[2] |
Based on calculations with a shorter observation arc, the asteroid could have passed very close to Earth, about 9,700 km (6,000 mi), in mid-September, 2084.[3][5][6][7] According to astronomers, "Its small size of about 15 m (49 ft) would result in limited consequences even in case of impact."[3]
2019 in space | ||
---|---|---|
| ||
Space probe launches ![]() |
| |
Impact events |
| |
Selected NEOs |
| |
Exoplanets ![]() |
| |
Discoveries |
| |
Comets ![]() | ||
Space exploration |
| |
|
Small Solar System bodies | |||||||
---|---|---|---|---|---|---|---|
Minor planets |
| ||||||
Comets |
| ||||||
Other |
|