+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101115 (1998 RX51) Classification: Main-belt Asteroid          SPK-ID: 2101115 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0694761900787387 3.1957e-08   a 2.671873137334403 1.2695e-08 au q 2.486241571378682 8.5105e-08 au i 14.12477466635565 4.4029e-06 deg node 187.5411007560914 1.5039e-05 deg peri 110.9905716420997 3.6682e-05 deg M 85.47707993596383 3.2535e-05 deg tp 2458821.735424717020 (2019-Dec-04.23542472) 0.00014414 TDB period 1595.225845384807 4.37 1.137e-05 3.113e-08 d yr n .2256733747397123 1.6084e-09 deg/d Q 2.857504703290124 1.3577e-08 au   Orbit Determination Parameters    # obs. used (total)      832      data-arc span      8220 days (22.51 yr)      first obs. used      1998-07-04      last obs. used      2021-01-04      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56793      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:35:16   Additional Information  Earth MOID = 1.5094 au   Jupiter MOID = 2.31317 au   T_jup = 3.334  [ 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 15.40   n/a E2021B55   diameter diameter 2.379 km 0.622 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.237   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101115 (1998 RX51)          Discovered 1998-Sep-14 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 RX51 = 2001 FS149  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 21:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin