+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101112 (1998 RG51) Classification: Main-belt Asteroid          SPK-ID: 2101112 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2685140254981003 3.5433e-08   a 2.604211317563899 1.0501e-08 au q 1.904944053437105 8.9105e-08 au i 4.050905532791338 3.8392e-06 deg node 264.8595790767507 9.847e-05 deg peri 24.31848498145677 9.9101e-05 deg M 99.89426065220961 1.3104e-05 deg tp 2458574.557676203722 (2019-Apr-01.05767620) 5.4924e-05 TDB period 1535.015481024718 4.20 9.2843e-06 2.542e-08 d yr n .2345253220245555 1.4185e-09 deg/d Q 3.303478581690694 1.332e-08 au   Orbit Determination Parameters    # obs. used (total)      582      data-arc span      7811 days (21.39 yr)      first obs. used      1998-09-14      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47795      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:15:59   Additional Information  Earth MOID = .889498 au   Jupiter MOID = 1.89168 au   T_jup = 3.358  [ 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 15.9   n/a MPO253940   diameter diameter 1.700 km 0.352 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.293   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101112 (1998 RG51)          Discovered 1998-Sep-14 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 RG51 = 2002 NZ19  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Dec-03 05:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin