+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102P/Shoemaker 1 Classification: Jupiter-family Comet          SPK-ID: 1000083 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2012-Feb-25.0] K133/5 (default) [epoch=2006-May-25.0] 24 Orbital Elements at Epoch 2455982.5 (2012-Feb-25.0) TDB Reference: JPL K133/5 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4732076238332613 6.4288e-07   a 3.736849126524985 3.2353e-07 au q 1.968543630738699 2.5392e-06 au i 26.24590768369254 3.3437e-05 deg node 339.8794153628378 5.4918e-05 deg peri 18.73489843638509 0.0001912 deg M 284.3950575465321 6.029e-05 deg tp 2456536.620808141088 (2013-Sep-01.12080814) 0.00042672 TDB period 2638.498019538425 7.22 0.00034265 9.381e-07 d yr n .136441262162849 1.7719e-08 deg/d Q 5.505154622311272 4.7662e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] -1.106075867921192E-8 1.43E-9 A2 [EST] -2.329593168815982E-9 2.746E-11 A3 [EST] -9.547106594399124E-9 6.233E-10   Orbit Determination Parameters    # obs. used (total)      398      data-arc span      7505 days (20.55 yr)      first obs. used      1999-12-31      last obs. used      2020-07-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .83874      source      ORB      producer      Shantanu Naidu      solution date      2020-Aug-08 22:48:33   Additional Information  Earth MOID = .973751 au   Jupiter MOID = .190961 au   T_jup = 2.732  [ 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 16.5   0.7 K133/5 2 parameter fit from 68 observations, autocmod 2.8 comet total magnitude slope K1 4.5   n/a K133/5 autocmod 2.8 diameter diameter 3.2 km n/a Scotti,J (1994) BAAS 26:1375   102P/Shoemaker 1          Discovered 1984-Sep-27 by Shoemaker, Carolyn S. and Eugene M. at Palomar Mountain Observatory, California discovered on plate/photo taken on discovery date as well as 9/28 Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1992.0   102P/1991 L2   1991 XXIII   1991p   1984.8   102P/1984 S2   1984 XVI   1984q  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 11:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin