+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03147182770091348 4.1601e-08   a 2.791299151820011 1.3721e-08 au q 2.703451865852225 1.1964e-07 au i 2.699891149521507 4.4582e-06 deg node 174.9919313550175 7.5567e-05 deg peri 331.6611768310083 9.9297e-05 deg M 338.1698535380265 6.3092e-05 deg tp 2459103.790921270225 (2020-Sep-11.29092127) 0.00029855 TDB period 1703.366109890933 4.66 1.256e-05 3.439e-08 d yr n .2113462266917186 1.5584e-09 deg/d Q 2.879146437787796 1.4153e-08 au   Orbit Determination Parameters    # obs. used (total)      1729      data-arc span      12199 days (33.40 yr)      first obs. used      1986-11-30      last obs. used      2020-04-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50855      source      ORB      producer      Otto Matic      solution date      2020-May-20 03:36:30   Additional Information  Earth MOID = 1.71472 au   Jupiter MOID = 2.09755 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 ] 2020-Oct-30 00:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin