+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118406 (1999 RM168) Classification: Main-belt Asteroid          SPK-ID: 2118406 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2417249234814521 4.6159e-08   a 3.067000721194185 2.5482e-08 au q 2.325630206545962 1.4722e-07 au i 6.834522713507424 6.7475e-06 deg node 168.0804937690958 4.3814e-05 deg peri 117.806182056477 4.62e-05 deg M 21.80567695845977 1.2673e-05 deg tp 2459081.667203595502 (2020-Aug-20.16720360) 6.8798e-05 TDB period 1961.86556313365 5.37 2.445e-05 6.694e-08 d yr n .1834988119292838 2.2869e-09 deg/d Q 3.808371235842408 3.1642e-08 au   Orbit Determination Parameters    # obs. used (total)      665      data-arc span      11688 days (32.00 yr)      first obs. used      1988-08-19      last obs. used      2020-08-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51083      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 18:11:46   Additional Information  Earth MOID = 1.3172 au   Jupiter MOID = 1.45896 au   T_jup = 3.176  [ 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 14.99   n/a E2021B55   diameter diameter 5.473 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.071   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   118406 (1999 RM168)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ show close-approach data ] Alternate Designations  1999 RM168 = 1988 QH = 1992 EZ32  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 23:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin