2009 KK

2009 KK is an Apollo near-Earth asteroid which was listed for several weeks in May and June 2009 on the Sentry Risk Table with a Torino Scale rating of 1.[3] There was a 1 in 10000 chance of an impact on 29 May 2022.[3] On 22 May 2009, it was listed as one of two near-earth objects assessed above Level 0 for potential impacts within 100 years, the other being 2007 VK184. As of 10 June 2009 it was downgraded to Level 0 as the cumulative Earth-impact probability was assessed as 7.9e-06 or 1 in 127,000.[4] On 17 June 2009, JPL removed 2009 KK from the list of potential Earth impactors.[5] It is now known that on 4 May 2022 the asteroid will be 0.475 AU (71,100,000 km; 44,200,000 mi) from Earth.[2]

2009 KK
Discovery[1]
Discovered byCatalina Sky Survey
Discovery siteSummerhaven, Arizona, USA
Discovery dateMay 7, 2009
Designations
2009 KK
MPO 218092
Apollo
NEO
Orbital characteristics[2]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 1[1]
Observation arc953[1] d
Aphelion2.18591 AU (327.007 Gm)
Perihelion0.81835 AU (122.423 Gm)
1.50213 AU (224.715 Gm)
Eccentricity0.45521
1.84 yr (672.452 d)
1.84 yr
143.59°
0° 32m 6.756s /day
Inclination18.2159°
68.1587°
247.32°
Earth MOID0.0000955542 AU (14,294.70 km)[2]
Mercury MOID0.3949 AU (59,080,000 km)[1]
Jupiter MOID3.23017 AU (483.227 Gm)[2]
Physical characteristics
20.5[2]

    2194 passage

    2009 KK may pass as close as 0.006 AU (900,000 km; 560,000 mi) from Earth on 2194-Jun-02.[2] But the nominal solution shows the asteroid passing 0.038 AU (5,700,000 km; 3,500,000 mi) from Earth.[2]

    References
    1. "2009 KK". Minor Planet Center. Retrieved 16 August 2017.
    2. "(2009 KK)". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3460260. Retrieved 16 August 2017.
    3. "2009 KK Impact Risk". Near Earth Object Program. NASA. Archived from the original on 4 June 2009.
    4. "WayBack Machine archive from 11 June 2009". Wayback Machine. 11 June 2009. Archived from the original on 11 June 2009. Retrieved 22 May 2009.
    5. "NEOs Removed from Impact Risks Tables". Near Earth Object Program. NASA. 17 June 2009. Archived from the original on 18 June 2009. Retrieved 17 June 2009.


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