+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   163P/NEAT Classification: Jupiter-family Comet          SPK-ID: 1000521 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2006-Oct-10.0] 39 (default) [epoch=1998-Jan-27.0] SAO/1998 [epoch=1991-Jan-24.0] SAO/1991 Orbital Elements at Epoch 2454018.5 (2006-Oct-10.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4761945044977119 2.2773e-07   a 3.677296494477345 1.7307e-07 au q 1.926188112398533 9.1119e-07 au i 12.49015044624771 1.6527e-05 deg node 103.4408850800716 6.9415e-05 deg peri 347.8690764023282 6.983e-05 deg M 86.07038168906621 8.0696e-06 deg tp 2453402.695828360176 (2005-Feb-01.19582836) 5.621e-05 TDB period 2575.676991781001 7.05 0.00018183 4.978e-07 d yr n .1397690786339909 9.8672e-09 deg/d Q 5.428404876556157 2.5548e-07 au   Orbit Determination Parameters    # obs. used (total)      350      data-arc span      10737 days (29.40 yr)      first obs. used      1990-10-24      last obs. used      2020-03-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .82227      source      ORB      producer      Javier Roa      solution date      2020-Apr-21 19:14:02   Additional Information  Earth MOID = .944803 au   Jupiter MOID = .0888393 au   T_jup = 2.858  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 11.7   0.8 39 2 parameter fit from 157 observations, autocmod 2.8 comet total magnitude slope K1 20.   n/a 39 autocmod 2.8 comet nuclear magnitude M2 16.5   0.7 39 from 128 observations, autocmod 2.8 comet nuclear magnitude slope K2 5.   n/a 39 autocmod 2.8 comet nuclear phase coefficient PC 0.03   n/a 39 autocmod 2.8 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2005.1   163P/2004 V4        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-07 09:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin