2019 SU3

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.

2019 SU3
Discovery [1][2]
Discovered byATLAS-HKO
Discovery siteHaleakala Obs.
Discovery date23 September 2019
(first observed only)
Designations
2019 SU3
NEO · Apollo [1][2]
Orbital characteristics [2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2[2] · 3[1]
Observation arc28 days
Aphelion1.1948 AU
Perihelion0.9922 AU
1.0935 AU
Eccentricity0.0927
1.14 yr (418 d)
257.62°
0° 51m 42.84s / day
Inclination1.1621°
5.1182°
322.69°
Earth MOID0.0022 AU (0.86 LD)
Physical characteristics
Mean diameter
15 m[3][4]
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]

    Trajectory
    2019 SU3 asteroid trajectory – as/of 12 October 2019
    (Asteroid orbit is in white; Earth orbit is in blue)[2]

    See also

    References
    1. "2019 SU3". Minor Planet Center. Retrieved 30 November 2019.
    2. "JPL Small-Body Database Browser: (2019 SU3)" (2019-10-21 last obs.). Jet Propulsion Laboratory. Retrieved 30 November 2019. (per 12 October 2019)
    3. 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.
    4. Wackback Machine Archive for 2019 SU3 on the esa Risk List
    5. Wehner, Mike (12 October 2019). "Newly-discovered asteroid could strike Earth within decades". MSN News. Retrieved 12 October 2019.
    6. Carpineti, Alfredo (10 October 2019). "Newly Discovered Asteroid Is At Slight Risk Of Hitting Earth In 2084". IFLScience. Retrieved 13 October 2019.
    7. Wackback Machine Archive for 2019 SU3 close approaches
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