+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20547 (1999 RD105) Classification: Main-belt Asteroid          SPK-ID: 2020547 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1081665115718048 3.4266e-08   a 3.165157951971392 1.6333e-08 au q 2.822793857732889 1.1215e-07 au i 5.715770998401445 3.4837e-06 deg node 171.2574381630988 3.8877e-05 deg peri 84.14791374143185 4.3904e-05 deg M 26.10883605802759 1.796e-05 deg tp 2459051.331707386388 (2020-Jul-20.83170739) 0.00010291 TDB period 2056.797370114445 5.63 1.592e-05 4.359e-08 d yr n .1750293953263703 1.3548e-09 deg/d Q 3.507522046209895 1.8099e-08 au   Orbit Determination Parameters    # obs. used (total)      1885      data-arc span      10772 days (29.49 yr)      first obs. used      1991-03-15      last obs. used      2020-09-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48424      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:23:42   Additional Information  Earth MOID = 1.81415 au   Jupiter MOID = 1.55824 au   T_jup = 3.187  [ 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 13.30   n/a E2021B10   diameter diameter 10.958 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.085   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20547 (1999 RD105)          Discovered 1999-Sep-08 by LINEAR at Socorro Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 RD105 = 1993 RQ10 = 1998 OU5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 21:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin