+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118407 (1999 RA201) Classification: Main-belt Asteroid          SPK-ID: 2118407 [ 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 .2430962399875594 4.1692e-08   a 3.007810366335427 1.6228e-08 au q 2.276622975683682 1.3195e-07 au i 13.17006077812545 3.8233e-06 deg node 290.9263071966098 1.806e-05 deg peri 127.4756193274849 2.1224e-05 deg M 348.8375463106882 7.7607e-06 deg tp 2459259.578746739683 (2021-Feb-14.07874674) 4.1002e-05 TDB period 1905.347105417398 5.22 1.542e-05 4.222e-08 d yr n .1889419512992809 1.5291e-09 deg/d Q 3.738997756987173 2.0173e-08 au   Orbit Determination Parameters    # obs. used (total)      1367      data-arc span      7902 days (21.63 yr)      first obs. used      1999-07-22      last obs. used      2021-03-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4496      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 16:57:08   Additional Information  Earth MOID = 1.3158 au   Jupiter MOID = 1.71637 au   T_jup = 3.166  [ 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 14.09   n/a E2021B55   diameter diameter 6.544 km 1.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.114   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   118407 (1999 RA201)          Discovered 1999-Sep-08 by LINEAR at Socorro Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ show close-approach data ] Alternate Designations  1999 RA201 = 2000 YY104  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 22:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin