+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2363142708416301 4.9036e-08   a 2.359976219561788 1.3168e-08 au q 1.802280160032458 1.1409e-07 au i 9.817373391121716 7.1726e-06 deg node 344.4797074632866 2.4255e-05 deg peri 291.070810625404 3.0484e-05 deg M 276.1714470271927 2.1583e-05 deg tp 2459508.853822022090 (2021-Oct-21.35382202) 8.0543e-05 TDB period 1324.219159120657 3.63 1.1083e-05 3.034e-08 d yr n .271858323088345 2.2754e-09 deg/d Q 2.917672279091119 1.628e-08 au   Orbit Determination Parameters    # obs. used (total)      596      data-arc span      14583 days (39.93 yr)      first obs. used      1981-02-09      last obs. used      2021-01-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46853      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:37:20   Additional Information  Earth MOID = .812358 au   Jupiter MOID = 2.31344 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 ] 2021-Mar-01 17:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin