+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11747 (1999 NQ9) Classification: Main-belt Asteroid          SPK-ID: 2011747 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03134513988293971 4.126e-08   a 2.790951036452364 1.3553e-08 au q 2.703468285808329 1.1847e-07 au i 2.700212046857151 4.4493e-06 deg node 174.9874646535279 7.4971e-05 deg peri 331.4779945716631 9.899e-05 deg M 20.61881349328772 6.3246e-05 deg tp 2459102.958838561037 (2020-Sep-10.45883856) 0.00029918 TDB period 1703.047468248264 4.66 1.2405e-05 3.396e-08 d yr n .2113857697520857 1.5398e-09 deg/d Q 2.878433787096399 1.3978e-08 au   Orbit Determination Parameters    # obs. used (total)      1783      data-arc span      12468 days (34.14 yr)      first obs. used      1986-11-30      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50354      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:02:15   Additional Information  Earth MOID = 1.71459 au   Jupiter MOID = 2.09736 au   T_jup = 3.327  [ 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 13.9   n/a MPO365391   diameter diameter 5.911 km 0.294 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.127   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11747 (1999 NQ9)          Discovered 1999-Jul-13 by LINEAR at Socorro Reference: 19990928/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 NQ9 = 1986 WK9 = 1993 FE42 = 1998 KN1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-24 21:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin