+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   281P/MOSS Classification: Jupiter-family Comet          SPK-ID: 1003234 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455414.5 (2010-Aug-06.0) TDB Reference: JPL 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1735899416775329 1.52e-06   a 4.862376225775631 1.6528e-05 au q 4.018316620329017 1.1297e-05 au i 4.720989637504819 7.2777e-05 deg node 87.1882997896256 0.0013108 deg peri 25.99138379333293 0.025394 deg M 300.9383172161361 0.018582 deg tp 2456057.002144775568 (2012-May-09.50214478) 0.20542 TDB period 3916.257736266155 10.72 0.019968 5.467e-05 d yr n .09192449124741005 4.687e-07 deg/d Q 5.706435831222246 1.9397e-05 au   Orbit Determination Parameters    # obs. used (total)      98      data-arc span      4550 days (12.46 yr)      first obs. used      2000-11-17      last obs. used      2013-05-03      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      3      norm. resid. RMS      .62345      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:28:15   Additional Information  Earth MOID = 3.03444 au   Jupiter MOID = .0821352 au   T_jup = 2.968  [ 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 11.3   0.6 10 from 56 observations, assumed slope, autocmod 2.9c comet total magnitude slope K1 10.   n/a 10 autocmod 2.9c comet nuclear magnitude M2 14.4   0.6 10 from 40 observations, autocmod 2.9c comet nuclear magnitude slope K2 5.   n/a 10 autocmod 2.9c comet nuclear phase coefficient PC 0.03   n/a 10 autocmod 2.9c [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2012.4   281P/2013 CE31        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-21 03:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin