+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2683879144744899 3.5393e-08   a 2.604752727007394 1.051e-08 au q 1.90566857488414 8.9012e-08 au i 4.05040285771598 3.8248e-06 deg node 264.8610745382267 9.5854e-05 deg peri 24.35866279153427 9.6475e-05 deg M 146.7429501292725 1.2952e-05 deg tp 2458574.602921958505 (2019-Apr-01.10292196) 5.377e-05 TDB period 1535.494195097215 4.20 9.2932e-06 2.544e-08 d yr n .2344522051268371 1.419e-09 deg/d Q 3.303836879130649 1.333e-08 au   Orbit Determination Parameters    # obs. used (total)      593      data-arc span      8148 days (22.31 yr)      first obs. used      1998-09-14      last obs. used      2021-01-04      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48008      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:35:15   Additional Information  Earth MOID = .888288 au   Jupiter MOID = 1.89091 au   T_jup = 3.357  [ 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 15.93   n/a E2021B55   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 ] 2021-Apr-19 22:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin