+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   53P/Van Biesbroeck Classification: Jupiter-family Comet          SPK-ID: 1000102 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2011-Aug-09.0] K162/8 (default) [epoch=2001-Jul-11.0] K035/1 [epoch=1991-Apr-14.0] SAO/1991 [epoch=1978-Nov-28.0] SAO/1978 [epoch=1966-Jul-14.0] SAO/1966 [epoch=1954-Feb-27.0] SAO/1954 Orbital Elements at Epoch 2455782.5 (2011-Aug-09.0) TDB Reference: JPL K162/8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5510744634278288 7.3981e-08   a 5.404500638380561 1.1297e-07 au q 2.426218348989635 4.297e-07 au i 6.611254102620895 6.7155e-06 deg node 148.8977993028672 9.069e-05 deg peri 134.2654652081746 9.4239e-05 deg M 224.5394756349046 1.6223e-05 deg tp 2457509.299989079199 (2016-Apr-30.79998908) 0.00025704 TDB period 4589.145058917946 12.56 0.00014389 3.939e-07 d yr n .07844598402929603 2.4596e-09 deg/d Q 8.382782927771487 1.7522e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] -1.216840672420297E-8 1.172E-9 A2 [EST] 4.627173099646659E-9 4.58E-10 A3 [EST] 2.212587938595131E-9 4.381E-10 DT [EST] -179.1889805451431 11.81   Orbit Determination Parameters    # obs. used (total)      2911      data-arc span      6192 days (16.95 yr)      first obs. used      2001-02-20      last obs. used      2018-02-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .61036      source      ORB      producer      Davide Farnocchia      solution date      2018-Feb-28 15:29:43   Additional Information  Earth MOID = 1.41526 au   Jupiter MOID = .00942527 au   T_jup = 2.652  [ 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 9.9   0.8 K162/8 2 parameter fit from 871 observations, autocmod 2.6m comet total magnitude slope K1 10.   n/a K162/8 autocmod 2.6m comet nuclear magnitude M2 12.5   0.6 K162/8 from 1611 observations, autocmod 2.6m comet nuclear magnitude slope K2 5.   n/a K162/8 autocmod 2.6m comet nuclear phase coefficient PC 0.03   n/a K162/8 autocmod 2.6m diameter diameter 6.66 km n/a Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A.; (2004) Comets II, pp. 223-264   53P/Van Biesbroeck          Discovered 1954-Sep-01 by Van Biesbroeck, George at Yerkes Observatory discovered on plate/photo taken on discovery date Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1991.2       1991 VI   1989h1   1978.6       1978 XXIV   1977s   1966.1   53P/1965 J1   1966 III   1965d   1953.5   53P/1954 R1   1954 IV   1954i  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 06:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin