+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   105P/Singer Brewster Classification: Jupiter-family Comet          SPK-ID: 1000086 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2011-Oct-26.0] 45 (default) [epoch=1999-Apr-12.0] SAO/1999 [epoch=1992-Oct-25.0] SAO/1992 [epoch=1986-Jun-19.0] SAO/1986 Orbital Elements at Epoch 2455860.5 (2011-Oct-26.0) TDB Reference: JPL 45 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4092921638289355 8.7878e-08   a 3.471809698675179 2.0327e-08 au q 2.05082519470213 3.0376e-07 au i 9.170617424610311 1.7311e-05 deg node 192.4200557547587 4.2352e-05 deg peri 46.6837131983796 7.0793e-05 deg M 341.2295966722326 3.0174e-05 deg tp 2455983.697926593761 (2012-Feb-26.19792659) 0.00019775 TDB period 2362.829013276682 6.47 2.0751e-05 5.681e-08 d yr n .1523597340210266 1.3381e-09 deg/d Q 4.892794202648227 2.8647e-08 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A2 [EST] -6.832566625367815E-10 1.082E-12   Orbit Determination Parameters    # obs. used (total)      757      data-arc span      12199 days (33.40 yr)      first obs. used      1986-05-03      last obs. used      2019-09-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .77422      source      ORB      producer      Javier Roa      solution date      2019-Oct-10 10:25:04   Additional Information  Earth MOID = 1.05045 au   Jupiter MOID = .365801 au   T_jup = 2.970  [ 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 13.7   0.9 45 2 parameter fit from 367 observations, autocmod 2.8 comet total magnitude slope K1 10.   n/a 45 autocmod 2.8 diameter diameter 2.2 km n/a Scotti,J (1994) BAAS 26:1375   105P/Singer Brewster          Discovered 1986-May-03 by Singer-Brewster, Stephen at Palomar Mountain Observatory, California discovered on plate/photo taken on discovery date as well as 5/4 Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1992.7   105P/1992 G1   1992 XXVI   1992e   1986.3   105P/1986 J1   1986 XI   1986d  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 18:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin