+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120447 (1981 EP32) Classification: Main-belt Asteroid          SPK-ID: 2120447 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2363258388675511 5.0097e-08   a 2.360245524109635 1.3229e-08 au q 1.802458520691042 1.1658e-07 au i 9.816423256578894 7.6219e-06 deg node 344.4823403384945 2.4321e-05 deg peri 291.0339695196127 3.1149e-05 deg M 221.8507007397297 2.2242e-05 deg tp 2459508.753510000152 (2021-Oct-21.25351000) 8.3631e-05 TDB period 1324.445832007736 3.63 1.1135e-05 3.049e-08 d yr n .2718117957714235 2.2853e-09 deg/d Q 2.918032527528227 1.6356e-08 au   Orbit Determination Parameters    # obs. used (total)      588      data-arc span      13862 days (37.95 yr)      first obs. used      1981-02-09      last obs. used      2019-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46889      source      ORB      producer      Otto Matic      solution date      2019-Jul-13 04:51:23   Additional Information  Earth MOID = .814323 au   Jupiter MOID = 2.31376 au   T_jup = 3.494  [ 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 15.8   n/a MPO401062   diameter diameter 2.066 km 0.253 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.344   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120447 (1981 EP32)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ show close-approach data ] Alternate Designations  1981 EP32 = 2000 RL6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-26 16:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin