+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   D/1993 F2-L (Shoemaker-Levy 9) Classification: Jupiter-family Comet          SPK-ID: 1000191 [ 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 L49 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2093610773818528 4.4202e-06   a 6.804157439882311 3.9185e-05 au q 5.379631707592801 3.3115e-06 au i 5.863130922736858 3.6218e-05 deg node 220.8375140775926 8.4312e-05 deg peri 354.9845262803184 0.0011664 deg M 2.229687088770825 0.00076335 deg tp 2449440.348536816806 (1994-Mar-28.84853682) 0.013424 TDB period 6482.760212742804 17.75 0.056001 0.0001533 d yr n .05553190125594462 4.7971e-07 deg/d Q 8.228683172171822 4.7389e-05 au   Orbit Determination Parameters    planetary ephem.      DE403      source      ORB   Additional Information  Earth MOID = 4.37316 au   Jupiter MOID = .00496369 au   T_jup = 2.989   not valid before 1992-Jul-15.00000000   not valid after 1994-Jul-19.92847222   Valid 1992-Jul-15_00:00 to 1994-Jul-19_22:17 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-L        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] 2021-Jan-21 16:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin