+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   59908 (1999 RS154) Classification: Outer Main-belt Asteroid          SPK-ID: 2059908 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05957756105241466 3.8632e-08   a 3.221487592811232 1.8902e-08 au q 3.029559219070924 1.2253e-07 au i 2.562938504487847 3.5949e-06 deg node 284.1539694505735 0.00010145 deg peri 121.8100871641452 0.00010704 deg M 153.3514106972675 3.4783e-05 deg tp 2458100.860747300342 (2017-Dec-13.36074730) 0.00020208 TDB period 2111.947516487032 5.78 1.8588e-05 5.089e-08 d yr n .1704587813805223 1.5003e-09 deg/d Q 3.41341596655154 2.0028e-08 au   Orbit Determination Parameters    # obs. used (total)      1556      data-arc span      7613 days (20.84 yr)      first obs. used      1999-08-08      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51316      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:44:38   Additional Information  Earth MOID = 2.03995 au   Jupiter MOID = 1.85477 au   T_jup = 3.185  [ 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 13.6   n/a MPO302387   diameter diameter 11.039 km 0.210 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.063   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   59908 (1999 RS154)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 RS154 = 2000 VJ38  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 13:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin