2008 CK70
| Discovery[1] | |
|---|---|
| Discovered by | LINEAR (704) |
| Discovery date | 9 February 2008 |
| Designations | |
| 2008 CK70 | |
| Apollo NEO,[2] | |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 5 | |
| Observation arc | 35 days |
| Earliest precovery date | 10 January 2008 |
| Aphelion | 1.6207 AU (242.45 Gm) (Q) |
| Perihelion | 0.58524 AU (87.551 Gm) (q) |
| 1.1030 AU (165.01 Gm) (a) | |
| Eccentricity | 0.46940 (e) |
| 1.16 yr (423.10 d) | |
| 246.51° (M) | |
| 0° 51m 3.096s /day (n) | |
| Inclination | 6.0752° (i) |
| 145.76° (Ω) | |
| 105.87° (ω) | |
| Earth MOID | 0.000207059 AU (30,975.6 km) |
| Physical characteristics | |
| Dimensions | ~31 meters (102 ft)[3] |
| Mass | 4.0×107 kg (assumed)[3] |
| 24.9[2] | |
2008 CK70 (also written 2008 CK70) is an Apollo 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]- ^ a b "MPEC 2008-C69 : 2008 CK70". IAU Minor Planet Center. 11 February 2008. Archived from the original on 16 August 2013. Retrieved 15 August 2013. (K08C70K)
- ^ a b c d e "JPL Small-Body Database Browser: (2008 CK70)" (last observation: 2008-02-14; arc: 35 days). Jet Propulsion Laboratory. Retrieved 30 March 2016.
- ^ a b c d e "Earth Impact Risk Summary: 2008 CK70". Wayback Machine: NASA/JPL Near-Earth Object Program Office. Archived from the original on 9 October 2013. Retrieved 15 August 2013.
- ^ "Sentry Risk Table". Wayback Machine: NASA/JPL Near-Earth Object Program Office. 15 August 2013. Archived from the original on 25 November 2013. Retrieved 15 August 2013.
- ^ "Orbit 2008 CK70". IAU Minor Planet Center. Retrieved 23 January 2014.
- ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 23 January 2014.
- ^ "2008CK70 Ephemerides for 15 September 2017 through 15 October 2017". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 20 February 2014.
- ^ a b "JPL Close-Approach Data: (2008 CK70)" (last observation: 2008-02-14; arc: 35 days). Retrieved 23 January 2014.
- ^ Math: 102.94 = 870
- ^ "The Palermo Technical Impact Hazard Scale". NASA/JPL Near-Earth Object Program Office. 31 August 2005. Archived from the original on 21 March 2002. Retrieved 15 August 2013.
- ^ Horizons output. "Horizon Online Ephemeris System". Retrieved 23 January 2014. (Geocentric Solution)
External links
[edit]- Canadian Astro Data Centre SSOIS: Solar Sys object image search
- Lost NEOs (part 2): how to find them… online! / mpml #30423(02 Oct 2014)
- Fast method for the estimation of impact probability of near-Earth objects – Vavilov and Medvedev
- 2008 CK70 at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2008 CK70 at ESA–space situational awareness
- 2008 CK70 at the JPL Small-Body Database
