+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   137P/Shoemaker-Levy 2 Classification: Jupiter-family Comet          SPK-ID: 1000126 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2457333.5 (2015-Nov-07.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .572069517862926 8.2387e-08   a 4.517561189737063 8.3586e-08 au q 1.933202138007915 4.0338e-07 au i 4.850458802445996 6.2241e-06 deg node 233.0730564957821 0.00013125 deg peri 140.9935558775509 0.00012951 deg M 243.6884491159225 3.9474e-06 deg tp 2458466.617216653027 (2018-Dec-14.11721665) 6.1643e-05 TDB period 3507.151223541397 9.60 9.7336e-05 2.665e-07 d yr n .1026474129725392 2.8488e-09 deg/d Q 7.101920241466211 1.314e-07 au   Orbit Determination Parameters    # obs. used (total)      1189      data-arc span      11112 days (30.42 yr)      first obs. used      1990-09-16      last obs. used      2021-02-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42509      source      ORB      producer      Otto Matic      solution date      2021-Mar-17 23:13:46   Additional Information  Earth MOID = .936689 au   Jupiter MOID = .0778173 au   T_jup = 2.675  [ 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 comet total magnitude M1 15.4   0.5 39 2 parameter fit from 579 observations, autocmod 2.9b comet total magnitude slope K1 4.5   n/a 39 autocmod 2.9b diameter diameter 5.8 km n/a DASTCOM value unverified rotation period rot_per 7.7 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong. Published Reference List: [Kokotankekova, R.; Snodgrass, C.; Lacerda, P.; Green S.F.; et al. (2017) Mon. Not. Royal Ast. Soc. 471, 2974-3007.] 137P/Shoemaker-Levy 2          Discovered 1990-Oct-25 by Shoemaker, Carolyn S. at Palomar Mountain Observatory, California discovered on plate/photo taken on discovery date as well as 11/13,15 Reference: comet.dis Last Updated: 2006-10-18 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1909-Sep-14 18:29 00:01 Jupiter 1.48834450018498 1.48834226818807 1.48834673218197 5.00880975288823 4.89387040427607 2418564.269978076 1.03027737515986 138.85482892712 103.889861568509 -68.1710926101571 1553453.33726665 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 1923-Jul-23 07:41 00:01 Jupiter 1.08406150020914 1.08405701509247 1.08406598532564 9.51372358750722 9.43123814714618 2423623.820066383 1.47749805133354 222.492117658286 153.997658749166 -0.239146971765373 563868.39499297 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 1957-Jun-10 05:25 < 00:01 Jupiter 1.49476755854064 1.49476559914562 1.49476951793557 5.1434894742921 5.0321135992306 2435999.725370499 0.637580701319443 150.963974051208 95.5219610581177 83.7742126614228 1739808.62421467 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 1992-Jun-23 08:04 < 00:01 Jupiter 1.83896554594858 1.8389633520827 1.83896773981447 11.2260266880293 11.184922022711 2448796.835812147 0.699035900359207 110.897938293908 79.7086156285562 15.0015554726273 1838813.07750329 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 2006-Apr-17 08:12 00:02 Jupiter 1.17703202072064 1.17702862359115 1.17703541785053 5.06699592699827 4.92292558175298 2453842.841644125 2.37607543868977 196.529863597303 152.264026253192 55.0463666331392 946632.649311766 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 2052-Nov-23 00:23 00:02 Jupiter 1.67167445036685 1.67167349820148 1.67167540253563 5.18204743083088 5.08332897180058 2470864.515630203 1.56447426539346 187.285464950861 34.1620855463982 79.9482062484037 3724530.6792789 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 2098-Dec-06 21:15 00:01 Jupiter 1.14804766821309 1.14804431925619 1.14805101717261 5.00004359727575 4.85024208292695 2487679.385646696 1.04263201947632 207.485411072374 116.484429451554 -46.1032063857511 1196757.4820416 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 2113-Feb-02 04:08 00:01 Jupiter 1.14606140732329 1.14605736928367 1.14606544536284 9.63199569140619 9.55495661520187 2492849.671985389 1.04914464259688 201.412601690835 136.132354368556 7.04296943318435 695593.963366991 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 2147-Nov-23 04:02 00:03 Jupiter 1.45920317494195 1.45920076274274 1.45920558714332 5.16913209304918 5.05558979478845 2505561.668279949 3.23500309966881 203.087328215185 99.0711460547514 67.9833514984481 1654437.889321 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 2181-Oct-11 18:12 < 00:01 Jupiter 0.884754810057219 0.884747610359794 0.884762009799505 8.32737006194463 8.21160072707529 2517938.258669881 0.41454423770681 486.861953298313 97.3001181667333 44.1976103297066 826672.646273678 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 2196-Feb-21 22:18 00:02 Jupiter 1.00409440889859 1.00409054310936 1.00409827468793 5.08142612197525 4.91261175252507 2523184.428852202 1.94950902875908 193.883275495453 170.672883632848 -9.35773887435643 819974.787112487 T 39 CATAB v2.0f-lin.ifort 2021-Mar-17 23:13:49 2021-Mar-17 23:13 Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1999.7   137P/1998 K6         1990.1   137P/1990 UL3   1990 XVI   1990p  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 09:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin