+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2568382070077998 5.9985e-08   a 2.380620061298912 1.5193e-08 au q 1.769185873188101 1.389e-07 au i 10.97573449270448 5.011e-06 deg node 285.1082712273989 2.8812e-05 deg peri 10.57778009710645 3.207e-05 deg M 194.8526166994862 1.945e-05 deg tp 2459815.964143774637 (2022-Aug-24.46414377) 7.645e-05 TDB period 1341.632469923487 3.67 1.2843e-05 3.516e-08 d yr n .2683298206255627 2.5687e-09 deg/d Q 2.992054249409724 1.9095e-08 au   Orbit Determination Parameters    # obs. used (total)      526      data-arc span      15535 days (42.53 yr)      first obs. used      1978-07-07      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51145      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 09:25:01   Additional Information  Earth MOID = .752298 au   Jupiter MOID = 2.22546 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 ] 2021-Mar-07 06:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin