+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2819 Ensor (1933 UR) Classification: Main-belt Asteroid          SPK-ID: 2002819 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2017733414522901 3.2005e-08   a 2.759101316453245 8.7586e-09 au q 2.202388224427061 8.9019e-08 au i 2.430628552621001 3.6199e-06 deg node 18.25775310967918 7.0099e-05 deg peri 344.1512850035961 7.0547e-05 deg M 338.919232907863 7.1248e-06 deg tp 2459098.524313345327 (2020-Sep-06.02431335) 3.3138e-05 TDB period 1673.978591484936 4.58 7.9709e-06 2.182e-08 d yr n .2150565137638079 1.024e-09 deg/d Q 3.315814408479429 1.0526e-08 au   Orbit Determination Parameters    # obs. used (total)      2776      data-arc span      31802 days (87.07 yr)      first obs. used      1933-10-20      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4216      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:08:34   Additional Information  Earth MOID = 1.19998 au   Jupiter MOID = 2.14025 au   T_jup = 3.311  [ 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 11.9   n/a MPO337272   diameter diameter 9.700 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.247   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   2819 Ensor (1933 UR)          Discovered 1933-Oct-20 by Delporte, E. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1933 UR = 1942 RC = 1965 UB = 1970 XG = 1977 ES3 = 1977 GR = 1979 UZ1 = 2019 GZ34  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 17:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin