Astronomy:(163132) 2002 CU11

From HandWiki
(163132) 2002 CU11
Discovery[1]
Discovered byLINEAR
Discovery date7 February 2002
Designations
(163132) 2002 CU11
Minor planet categoryNEO · PHA · Apollo[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc4600 days (12.59 yr)
|{{{apsis}}}|helion}}1.5795 astronomical unit|AU (236.29 Gm)
|{{{apsis}}}|helion}}0.85959 AU (128.593 Gm)
1.2196 AU (182.45 Gm)
Eccentricity0.29517
Orbital period1.35 yr (491.94 d)
Mean anomaly47.609°
Mean motion0° 43m 54.48s / day (n)
Inclination48.782°
Longitude of ascending node157.77°
110.54°
Earth MOID0.00189035 AU (282,792 km)
Physical characteristics
Mean diameter0.460±0.017 km[2][3]
0.730 km (assumed)[4]
Mass5.3×1011 kg (assumed)
Geometric albedo0.408±0.061[2]
Absolute magnitude (H)18.5[2]


(163132) 2002 CU11, provisional designation 2002 CU11, is a bright, sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group.[2] Based on absolute magnitude, it is the second largest asteroid known to have passed closer than the Moon.[5]

Description

2002 CU11 was discovered on 7 February 2002 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 730 meters (2,400 ft).[4] The asteroid was listed on Sentry Risk Table with a Torino Scale rating of 1 on 20 March 2002.[4]

With an observation arc of 44 days, (163132) 2002 CU11 showed a 1 in 9,300 chance of impacting Earth in 2049.[6] It was removed from the Sentry Risk Table on 26 April 2002.[7] It is now known that on 3 September 2049 the asteroid will be 0.0843 astronomical unit|AU (12,610,000 km; 7,840,000 mi) from Earth.[8]

Even though using an epoch of 27 June 2015 gives 2002 CU11 an Earth-MOID of 0.0000093 AU (1,390 km; 860 mi),[2] the asteroid does not make any threatening approaches to Earth in the foreseeable future.

Notable close-approaches to Earth[8]
Date Distance from Earth
1925-08-30 0.0023 astronomical unit|AU (340,000 km; 210,000 mi)
2014-08-30 0.0346 AU (5,180,000 km; 3,220,000 mi)
2049-09-03 0.0843 AU (12,610,000 km; 7,840,000 mi)
2080-08-31 0.0042 AU (630,000 km; 390,000 mi)

The close approach of 2080 will cause an uncertainty of 4 minutes for the close approach time of 2084.[8]


References

  1. ↑ 1.0 1.1 "MPEC 2002-C44 : 2002 CU11". IAU Minor Planet Center. 2002-02-08. https://www.minorplanetcenter.net/mpec/K02/K02C44.html. Retrieved 2013-09-18.  (K02C11U)
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "JPL Small-Body Database Browser: 163132 (2002 CU11)". Jet Propulsion Laboratory. Archived from the original on 28 May 2019. https://web.archive.org/web/20190528050531/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002CU11. Retrieved 7 April 2016. 
  3. ↑ "LCDB Data for (163132) 2002 CU11". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=163132. Retrieved 16 June 2020. 
  4. ↑ 4.0 4.1 4.2 "Current Impact Risks (2002 CU11)". Near-Earth Object Program. NASA. 2002-03-21. Archived from the original on March 21, 2002. https://web.archive.org/web/20020321092735/http://neo.jpl.nasa.gov/risk. 
  5. ↑ NEO Earth Close Approaches @ JPL CNEOS
    Select "Nominal dist <= 1 LD", "Past only", Sort by "H (mag)"
  6. ↑ Andrea Milani; Giovanni Valsecchi (2002). "The problem with 2002 CU11". Spaceguard / Tumbling Stone. http://spaceguard.rm.iasf.cnr.it/tumblingstone/issues/num12/eng/2002cu11.htm. Retrieved 2013-09-18. 
  7. ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. http://neo.jpl.nasa.gov/risk/removed.html. Retrieved 2013-09-18. 
  8. ↑ 8.0 8.1 8.2 "JPL Close-Approach Data: 163132 (2002 CU11)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002CU11;cad=1#cad. Retrieved 2013-09-18. 

External links

Preceded by
(152680) 1998 KJ9 		Large NEO Earth close approach
(inside the orbit of the Moon)
30 August 1925 		Succeeded by
2002 JE9



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:(163132)_2002_CU11&oldid=2990189"