+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70104 (1999 JG138) Classification: Main-belt Asteroid          SPK-ID: 2070104 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08914186256100612 4.4554e-08   a 3.170577169224958 1.9475e-08 au q 2.887946014966843 1.4613e-07 au i 22.96691072881913 6.2284e-06 deg node 47.68557474551175 1.0968e-05 deg peri 89.52588273098428 4.1405e-05 deg M 301.5813621895063 3.7664e-05 deg tp 2459335.122272382482 (2021-Apr-30.62227238) 0.00021581 TDB period 2062.081941185806 5.65 1.9e-05 5.202e-08 d yr n .1745808412409552 1.6086e-09 deg/d Q 3.453208323483073 2.1211e-08 au   Orbit Determination Parameters    # obs. used (total)      2227      data-arc span      9693 days (26.54 yr)      first obs. used      1994-05-03      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39763      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:54:18   Additional Information  Earth MOID = 2.01391 au   Jupiter MOID = 1.77906 au   T_jup = 3.073  [ 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 12.3   n/a MPO502589   diameter diameter 16.632 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70104 (1999 JG138)          Discovered 1999-May-08 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 JG138 = 1994 JL4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-27 20:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin