+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   D/1993 F2-E (Shoemaker-Levy 9) Classification: Jupiter-family Comet          SPK-ID: 1000185 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2449480.5 (1994-May-08.0) TDB Reference: JPL E50 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2144106471126862 4.6306e-06   a 6.848766803295232 4.1813e-05 au q 5.380318281076818 3.7633e-06 au i 5.966629244373592 4.132e-05 deg node 220.6137808842797 8.5507e-05 deg peri 354.9161510513367 0.0012294 deg M 2.403034293582742 0.00079663 deg tp 2449436.800701714904 (1994-Mar-25.30070172) 0.014123 TDB period 6546.617925780709 17.92 0.059953 0.0001641 d yr n .05499022611084618 5.0359e-07 deg/d Q 8.317215325513645 5.0778e-05 au   Orbit Determination Parameters    planetary ephem.      DE403      source      ORB   Additional Information  Earth MOID = 4.37393 au   Jupiter MOID = .00510441 au   T_jup = 2.989   not valid before 1992-Jul-15.00000000   not valid after 1994-Jul-17.63263888   Valid 1992-Jul-15_00:00 to 1994-Jul-17_15:11 UTC ERT  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] no physical parameters available [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1994.2   D/1993 F2-E        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] 2021-Jan-21 15:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin