2017 QC36

2017 QC36 (also written 2017 QC36) is a Near-Earth Object (NEO) and a Potentially Hazardous Asteroid (PHA), meaning that it has an orbit that can make close approaches to the Earth and large enough to cause significant regional damage in the event of impact. It is an Aten asteroid, meaning that it is an Earth-crossing asteroid that has an orbit smaller than the orbit of the Earth. It was first observed on August 18, 2017, when the asteroid was less than 1 AU from Earth[1] and had a solar elongation of 92 degrees.[5]

2017 QC36
Discovery [1] [2]
Discovery siteWISE space telescope
Discovery dateAugust 18, 2017
Designations
2017 QC36
[1][2][3]
Orbital characteristics[3]
Epoch 2017-Aug-19.0 (JD 2457984.5)
Uncertainty parameter 9
Observation arc0.46 days[4]
Aphelion1.06±0.05 AU (Q)
Perihelion0.50±0.09 AU (q)
0.78±0.04 AU (a)
Eccentricity0.36±0.14 (e)
0.69±0.05 years
219°±59° (M)
Inclination30° ? (i)
141°±21° (Ω)
353°±29° (ω)
Earth MOID0.041 AU (6,100,000 km) ?
Jupiter MOID3.98 AU (595,000,000 km) ?
Physical characteristics
Mean diameter
83 m[4]
190 m[2]
20.6[1]
20.7[3]
21.4[2]
23.1[4]

    This asteroid is a lost asteroid.[6] It has a short observation arc of 0.46 days and has not been seen since 2017, so it has an orbit that is only roughly calculated. Also, there are wide variations in the absolute magnitude cataloged by various organizations, leading to wide variations in the estimated size of the asteroid (83 m[4] vs 190 m[2]). These wide variations are in addition to the uncertainty in the size estimate caused by the uncertainty in the albedo.[7]

    This asteroid is in both the Risk List[2] of the European Space Agency (ESA) - Space Situational Awareness (SSA) and in the Sentry List[8] of the Jet Propulsion Laboratory (JPL) - Center for Near Earth Object Studies (CNEOS). According to the Sentry List, of the possible close encounters with Earth in the foreseeable future, an encounter on February 20, 2024 has the highest Palermo Technical Impact Hazard Scale value.[4]

    According to the Near Earth Objects Dynamic Site (NEODyS), of the possible close encounters with Earth in the foreseeable future, an encounter on July 31, 2024 is the most likely.[9] This encounter has a minimum possible distance of zero, meaning that an impact onto Earth is possible.

    See also

    References
    1. "IAU Minor Planet Center 2017 QC36". International Astronomical Union. Retrieved 6 August 2020.
    2. "ESA space situational awareness 2017QC36". European Space Agency. Retrieved 6 August 2020.
    3. "JPL Small-Body Database Browser (2017 QC36)". Jet Propulsion Laboratory. Retrieved 6 August 2020.
    4. "Sentry: Earth Impact Monitoring - Object Details 2017 QC36". Jet Propulsion Laboratory. Retrieved 6 August 2020.
    5. "JPL HORIZONS Web-Interface (2017 QC36)". Jet Propulsion Laboratory. Retrieved 6 August 2020.
    6. "NEODyS-2 Risk List". SpaceDys. Retrieved 6 August 2020.
    7. "CNEOS - Asteroid Size Estimator". Jet Propulsion Laboratory. Retrieved 11 August 2020.
    8. "Sentry: Earth Impact Monitoring - Impact Risk Data". Jet Propulsion Laboratory. Retrieved 6 August 2020.
    9. "NEODyS-2 - Near Earth Objects - Dynamic Site - 2017QC36 - Close Approaches". SpaceDys. Retrieved 6 August 2020.
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