+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3695069941601867 4.0732e-08   a 3.07511200057407 2.0223e-08 au q 1.938836608536027 1.2537e-07 au i 10.7301648456185 1.0228e-05 deg node 148.981870446164 2.2168e-05 deg peri 288.6274888513717 2.6432e-05 deg M 320.5789033529303 1.261e-05 deg tp 2459216.183059244861 (2021-Jan-01.68305924) 6.9988e-05 TDB period 1969.653508711343 5.39 1.9429e-05 5.319e-08 d yr n .1827732636262162 1.8029e-09 deg/d Q 4.211387392612114 2.7695e-08 au   Orbit Determination Parameters    # obs. used (total)      386      data-arc span      13797 days (37.77 yr)      first obs. used      1982-10-19      last obs. used      2020-07-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53572      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 09:01:27   Additional Information  Earth MOID = .984996 au   Jupiter MOID = 1.31607 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 ] 2020-Oct-19 21:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin