+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120438 (1978 NU) Classification: Main-belt Asteroid          SPK-ID: 2120438 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2568877156042726 6.3306e-08   a 2.380462681465722 1.5805e-08 au q 1.768951061142771 1.4597e-07 au i 10.97639282606723 5.1022e-06 deg node 285.1085393748746 3.361e-05 deg peri 10.54919110315783 3.6575e-05 deg M 141.229039825143 1.9139e-05 deg tp 2458474.225898176469 (2018-Dec-21.72589818) 6.8307e-05 TDB period 1341.49943163985 3.67 1.3361e-05 3.658e-08 d yr n .2683564312509143 2.6727e-09 deg/d Q 2.991974301788673 1.9866e-08 au   Orbit Determination Parameters    # obs. used (total)      489      data-arc span      15176 days (41.55 yr)      first obs. used      1978-07-07      last obs. used      2020-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5191      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 06:19:32   Additional Information  Earth MOID = .754017 au   Jupiter MOID = 2.22593 au   T_jup = 3.469  [ 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 MPO348203   diameter diameter 4.250 km 0.350 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.056   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120438 (1978 NU)          Discovered 1978-Jul-07 by Williams, J. G. at Palomar Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ show close-approach data ] Alternate Designations  1978 NU = 2001 YH49 = 2004 RF213  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-30 16:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin