+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100001 (1982 UC3) Classification: Main-belt Asteroid          SPK-ID: 2100001 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3696512787201595 3.3639e-08   a 3.075740251495644 1.5141e-08 au q 1.938788934519214 1.0835e-07 au i 10.73008831320401 3.9155e-06 deg node 148.9808325490427 2.1358e-05 deg peri 288.6275311798054 2.3705e-05 deg M 357.136581294508 5.2151e-06 deg tp 2459216.171308789271 (2021-Jan-01.67130879) 2.8513e-05 TDB period 1970.257145180004 5.39 1.4548e-05 3.983e-08 d yr n .1827172665662939 1.3492e-09 deg/d Q 4.212691568472074 2.0738e-08 au   Orbit Determination Parameters    # obs. used (total)      728      data-arc span      13971 days (38.25 yr)      first obs. used      1982-10-19      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46396      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:24:02   Additional Information  Earth MOID = .984583 au   Jupiter MOID = 1.31551 au   T_jup = 3.096  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.6   n/a MPO474876   diameter diameter 4.351 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.044   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100001 (1982 UC3)          Discovered 1982-Oct-20 by Aldering, G. at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1982 UC3 = 2005 AW9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 15:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin