+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2415633272007015 4.6541e-08   a 3.066535306707109 2.5758e-08 au q 2.325772835040516 1.477e-07 au i 6.832033469571767 7.0636e-06 deg node 168.1094522785255 4.3996e-05 deg peri 117.8856021106032 4.6469e-05 deg M 345.0382696886318 1.3422e-05 deg tp 2459082.017284174532 (2020-Aug-20.51728417) 7.336e-05 TDB period 1961.419013182842 5.37 2.4713e-05 6.766e-08 d yr n .1835405885129151 2.3125e-09 deg/d Q 3.807297778373703 3.198e-08 au   Orbit Determination Parameters    # obs. used (total)      627      data-arc span      11624 days (31.82 yr)      first obs. used      1988-08-19      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52174      source      ORB      producer      Otto Matic      solution date      2020-Jun-24 01:51:32   Additional Information  Earth MOID = 1.31923 au   Jupiter MOID = 1.46088 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 14.9   n/a MPO432687   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 ] 2020-Oct-19 22:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin