| Discovery | |
|---|---|
| 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 |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 2 · 3 | |
| 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° 51 42.84 / 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 |
| Absolute magnitude (H) | 27.2 27.28 |
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. It was removed from the Sentry Risk Table on 12 October 2019.
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. According to astronomers, "Its small size of about 15 m (49 ft) would result in limited consequences even in case of impact."
Trajectory
(Asteroid orbit is in white; Earth orbit is in blue)
See also
References
- ^ "2019 SU3". Minor Planet Center. Retrieved 30 November 2019.
- ^ "JPL Small-Body Database Browser: (2019 SU3)" (2019-10-21 last obs.). Jet Propulsion Laboratory. Archived from the original on 12 October 2019. Retrieved 30 November 2019.
{{cite web}}: CS1 maint: bot: original URL status unknown (link)() - ^ Mack, Eric (11 October 2019). "Newly spotted asteroid could one day hit Earth, but don't panic - It's on a list of the riskiest space objects spotted so far, but how much should we really worry?". CNET. Retrieved 12 October 2019.
- Wackback Machine Archive for 2019 SU3 on the esa Risk List
- Wehner, Mike (12 October 2019). "Newly-discovered asteroid could strike Earth within decades". MSN News. Retrieved 12 October 2019.
- Carpineti, Alfredo (10 October 2019). "Newly Discovered Asteroid Is At Slight Risk Of Hitting Earth In 2084". IFLScience. Retrieved 13 October 2019.
- Wackback Machine Archive for 2019 SU3 close approaches
External links
- 2019 SU3 at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2019 SU3 at ESA–space situational awareness
- 2019 SU3 at the JPL Small-Body Database
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