+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101391 (1998 UM34) Classification: Main-belt Asteroid          SPK-ID: 2101391 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2642860598710377 4.5574e-08   a 2.351361450350491 1.1225e-08 au q 1.729929397304711 1.1e-07 au i 5.941566864868252 4.6133e-06 deg node 64.58598241503954 4.4457e-05 deg peri 283.4290545022059 4.5061e-05 deg M 15.99721862746352 8.1373e-06 deg tp 2458941.977954558567 (2020-Apr-02.47795456) 2.9594e-05 TDB period 1316.974959806261 3.61 9.4307e-06 2.582e-08 d yr n .2733537166514992 1.9574e-09 deg/d Q 2.972793503396272 1.4192e-08 au   Orbit Determination Parameters    # obs. used (total)      491      data-arc span      8032 days (21.99 yr)      first obs. used      1998-10-17      last obs. used      2020-10-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59522      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:00:52   Additional Information  Earth MOID = .735705 au   Jupiter MOID = 2.47753 au   T_jup = 3.503  [ 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 16.3   n/a MPO432541   diameter diameter 3.163 km 0.111 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.064   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101391 (1998 UM34)          Discovered 1998-Oct-28 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 UM34 = 2003 AQ19  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 13:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin