2008 CK70

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2008 CK70
Discovery[1]
Discovered by LINEAR (704)
Discovery date 09 February 2008
Designations
MPC designation 2008 CK70
Minor planet category Apollo NEO,[2]
Orbital characteristics[2]
Epoch 2013-Apr-18
(Uncertainty=6)[2]
Aphelion 1.620 AU (Q)
Perihelion 0.5852 AU (q)
Semi-major axis 1.102 AU (a)
Eccentricity 0.4692
Orbital period 1.16 yr
Mean anomaly 116.3° (M)
Inclination 6.068°
Longitude of ascending node 145.7°
Argument of perihelion 105.8°
Physical characteristics
Dimensions ~31 meters (102 ft)[3]
Mass 4.0×107 kg (assumed)[3]
Absolute magnitude (H) 24.9[2]

2008 CK70 (also written 2008 CK70) is a near-Earth asteroid.[2] In 2013 it had the 7th highest impact threat on the Palermo Technical Impact Hazard Scale.[4] It was discovered on 9 February 2008 by Lincoln Near-Earth Asteroid Research (LINEAR) at an apparent magnitude of 19 using a 1.0-meter (39 in) reflecting telescope.[1] It has an estimated diameter of 31 meters (102 ft)[3] and is not large enough to qualify as a potentially hazardous object. Ten precovery images from January 2008 have been located.[5] It was removed from the Sentry Risk Table on 21 December 2013.[6] It may be possible to recover the asteroid in late September 2017, but it will have an apparent magnitude of about 22.[7]

It has an observation arc of 35 days with an uncertainty parameter of 6.[2] Perturbations by Earth and Venus will increase the orbital uncertainty over time.[8] When the asteroid only had an observation arc of 5 days, virtual clones of the asteroid that fit the uncertainty region in the known trajectory showed a 1 in 2,700 chance that the asteroid could impact Earth on 14 February 2030.[3] With a 2030 Palermo Technical Scale of −2.94,[3] the odds of impact by 2008 CK70 in 2030 were about 870 times less[9] than the background hazard level of Earth impacts which is defined as the average risk posed by objects of the same size or larger over the years until the date of the potential impact.[10] The power of such an air burst would be somewhere between the Chelyabinsk meteor and the Tunguska event depending on the actual size of the asteroid. Using the nominal orbit, JPL Horizons shows that the asteroid will be 0.08 AU (12,000,000 km; 7,400,000 mi) from Earth on 14 February 2030.[11] On 19 May 2031, the asteroid may pass as close as 0.0088 AU (1,320,000 km; 820,000 mi) from Venus.[8]

References[edit]

  1. ^ a b "MPEC 2008-C69 : 2008 CK70". IAU Minor Planet Center. 2008-02-11. Retrieved 2013-08-15.  (K08C70K)
  2. ^ a b c d e f "JPL Small-Body Database Browser: (2008 CK70)". Jet Propulsion Laboratory. 2008-02-14 last obs (arc=35 days). Retrieved 2014-01-23. 
  3. ^ a b c d e "Earth Impact Risk Summary: 2008 CK70". Wayback Machine: NASA/JPL Near-Earth Object Program Office. Retrieved 2013-08-15. 
  4. ^ "Sentry Risk Table". Wayback Machine: NASA/JPL Near-Earth Object Program Office. 15 August 2013. Retrieved 2013-08-15. 
  5. ^ "Orbit 2008 CK70". IAU Minor Planet Center. Retrieved 2014-01-23. 
  6. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2014-01-23. 
  7. ^ "2008CK70 Ephemerides for 15 September 2017 through 15 October 2017". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2014-02-20. 
  8. ^ a b "JPL Close-Approach Data: (2008 CK70)". 2008-02-14 last obs (arc=35 days). Retrieved 2014-01-23. 
  9. ^ Math: 102.94 = 870
  10. ^ "The Palermo Technical Impact Hazard Scale". NASA/JPL Near-Earth Object Program Office. 31 Aug 2005. Retrieved 2013-08-15. 
  11. ^ Horizons output. "Horizon Online Ephemeris System". Retrieved 2014-01-23.  (Geocentric Solution)

External links[edit]