+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19699 (1999 SC7) Classification: Main-belt Asteroid          SPK-ID: 2019699 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2527281527875719 3.6126e-08   a 2.707531467456388 1.513e-08 au q 2.023262041071911 9.6971e-08 au i 9.595065565527751 5.231e-06 deg node 25.63219412446451 2.6469e-05 deg peri 260.4194432783055 2.908e-05 deg M 307.9994941701837 1.4267e-05 deg tp 2459435.551898596533 (2021-Aug-09.05189860) 6.5269e-05 TDB period 1627.266545669502 4.46 1.364e-05 3.734e-08 d yr n .2212298906765063 1.8544e-09 deg/d Q 3.391800893840865 1.8954e-08 au   Orbit Determination Parameters    # obs. used (total)      1621      data-arc span      11233 days (30.75 yr)      first obs. used      1990-05-03      last obs. used      2021-02-02      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47758      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:03:04   Additional Information  Earth MOID = 1.03229 au   Jupiter MOID = 1.90045 au   T_jup = 3.298  [ 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 MPO384923   diameter diameter 5.138 km 1.210 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.243   0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19699 (1999 SC7)          Discovered 1999-Sep-29 by LINEAR at Socorro Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 SC7 = 1990 JA1 = 1998 FD84  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 13:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin