+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   57P/duToit-Neujmin-Delporte Classification: Jupiter-family Comet          SPK-ID: 1000023 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2015-Dec-19.0] 21 (default) [epoch=2002-Jul-25.0] SAO/2002 [epoch=1996-Mar-18.0] SAO/1996 [epoch=1989-Oct-01.0] SAO/1989 [epoch=1983-May-26.0] SAO/1983 [epoch=1970-Oct-21.0] SAO/1970 [epoch=1941-Jul-25.0] SAO/1941 Orbital Elements at Epoch 2457375.5 (2015-Dec-19.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4992889286810742 9.8546e-08   a 3.452538989318305 1.3064e-07 au q 1.72872449611193 3.189e-07 au i 2.848332280065132 2.1753e-05 deg node 188.7994329470437 0.00019688 deg peri 115.214272881255 0.00021692 deg M 32.3770843557389 3.6604e-05 deg tp 2457164.762632554045 (2015-May-22.26263255) 0.00022744 TDB period 2343.183575364052 6.42 0.000133 3.641e-07 d yr n .1536371301783592 8.7204e-09 deg/d Q 5.17635348252468 1.9587e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 7.600102113351381E-9 8.911E-11 A2 [EST] 3.307496160787671E-11 4.637E-13 A3 [EST] -1.209113945893137E-9 6.682E-11   Orbit Determination Parameters    # obs. used (total)      719      data-arc span      16549 days (45.31 yr)      first obs. used      1970-07-27      last obs. used      2015-11-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      0      norm. resid. RMS      .71769      source      ORB      producer      Ryan S. Park      solution date      2015-Dec-09 11:31:49   Additional Information  Earth MOID = .715552 au   T_jup = 2.917  [ 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 13.9   1. 21 2 parameter fit from 217 observations, autocmod 2.6 comet total magnitude slope K1 11.   n/a 21 autocmod 2.6 57P/duToit-Neujmin-Delporte          Discovered 1941-Jul-18 by du Toit, D. at Boyden Observatory Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 10:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin