+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1917575536422366 5.8387e-08   a 3.222476521780217 2.197e-08 au q 2.604542307294099 1.9364e-07 au i 1.967059696480264 6.2406e-06 deg node 14.88821532395073 0.00012062 deg peri 3.572127090887064 0.00012115 deg M 311.0901378012618 1.3203e-05 deg tp 2459487.562860475865 (2021-Sep-30.06286048) 7.9374e-05 TDB period 2112.920076351748 5.78 2.1608e-05 5.916e-08 d yr n .1703803205947999 1.7424e-09 deg/d Q 3.840410736266335 2.6183e-08 au   Orbit Determination Parameters    # obs. used (total)      1099      data-arc span      14116 days (38.65 yr)      first obs. used      1981-10-23      last obs. used      2020-06-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55377      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:07:15   Additional Information  Earth MOID = 1.60528 au   Jupiter MOID = 1.62605 au   T_jup = 3.159  [ 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 13.86   n/a E2021B10   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 ] 2021-Apr-19 13:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin