+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06962282019625533 3.3597e-08   a 2.672057753857266 1.314e-08 au q 2.486021557306452 8.9732e-08 au i 14.12439545722419 4.5714e-06 deg node 187.5414147596329 1.5509e-05 deg peri 110.9873606215274 3.7287e-05 deg M 40.33221837072865 3.3037e-05 deg tp 2458821.762039886253 (2019-Dec-04.26203989) 0.00014637 TDB period 1595.391184523791 4.37 1.1768e-05 3.222e-08 d yr n .2256499869700963 1.6645e-09 deg/d Q 2.85809395040808 1.4055e-08 au   Orbit Determination Parameters    # obs. used (total)      809      data-arc span      8171 days (22.37 yr)      first obs. used      1998-07-04      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57317      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:28:49   Additional Information  Earth MOID = 1.51106 au   Jupiter MOID = 2.31413 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 15.3   n/a MPO436471   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 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2200-Jun-24 20:33 < 00:01 David 0.0466246536387808 0.0465874184625413 0.0466618888197589 7.01330829031829 7.01330824411803 2524768.355932412 0.464927492592513 1856.43063799912 38.7426305634693 -0.76783150198626 4461.26907382445 T 24 CATAB v2.0f-lin.ifort 2020-Dec-17 22:28:50 2020-Dec-17 22:28 Alternate Designations  1998 RX51 = 2001 FS149  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 02:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin