+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (1999 GL4) Classification: Apollo [NEO, PHA]          SPK-ID: 3019083 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6031806887292365 0.00016942   a 2.118322790389764 0.00064575 au q .840591390731628 0.00010265 au i 7.261185434323867 0.0010987 deg node 178.4236150310489 0.00099261 deg peri 293.9013423170585 0.0009646 deg M 332.7992974976441 1.1862 deg tp 2459085.587204365673 (2020-Aug-24.08720437) 3.7494 TDB period 1126.125090665926 3.08 0.51493 0.00141 d yr n .3196802939424044 0.00014618 deg/d Q 3.3960541900479 0.0010353 au   Orbit Determination Parameters    # obs. used (total)      48      data-arc span      239 days      first obs. used      1998-09-25      last obs. used      1999-05-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      6      norm. resid. RMS      .60314      source      ORB      producer      Otto Matic      solution date      2017-Apr-06 09:17:30   Additional Information  Earth MOID = .0256852 au   Jupiter MOID = 1.81867 au   T_jup = 3.466  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 19.7   n/a MPO154047   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-18 17:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin