+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13759 (1998 SK123) Classification: Outer Main-belt Asteroid          SPK-ID: 2013759 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1927454122566079 5.877e-08   a 3.221958416449123 2.0978e-08 au q 2.600940713196989 1.9566e-07 au i 1.966700097652481 6.3347e-06 deg node 15.01543181819185 0.00012333 deg peri 3.624766753416592 0.00012387 deg M 276.9514370626187 1.3121e-05 deg tp 2459487.812940851779 (2021-Sep-30.31294085) 8.0003e-05 TDB period 2112.410528270269 5.78 2.0631e-05 5.648e-08 d yr n .1704214191238591 1.6644e-09 deg/d Q 3.842976119701256 2.5021e-08 au   Orbit Determination Parameters    # obs. used (total)      1085      data-arc span      14116 days (38.65 yr)      first obs. used      1981-10-23      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55532      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:38:59   Additional Information  Earth MOID = 1.6031 au   Jupiter MOID = 1.62224 au   T_jup = 3.158  [ 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 13.8   n/a MPO435831   diameter diameter 11.789 km 0.623 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.042   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   13759 (1998 SK123)          Discovered 1998-Sep-26 by LINEAR at Socorro Reference: 20000222/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 SK123 = 1981 UC15 = 1992 SS8 = 1996 HE8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-26 01:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin