+ 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 2455430.5 (2010-Aug-22.0) TDB Reference: JPL 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1735992815756038 1.5385e-06   a 4.862122716926783 1.6684e-05 au q 4.018061706335871 1.1272e-05 au i 4.721092122703737 7.2616e-05 deg node 87.18681736250591 0.0013107 deg peri 26.01457121473731 0.025349 deg M 302.3911492658 0.018554 deg tp 2456057.148510071162 (2012-May-09.64851007) 0.20505 TDB period 3915.951468403324 10.72 0.020156 5.518e-05 d yr n .09193168069235165 4.7319e-07 deg/d Q 5.706183727517695 1.9581e-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.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      3      norm. resid. RMS      .63008      source      ORB      producer      Otto Matic      solution date      2014-Jun-13 19:42:14   Additional Information  Earth MOID = 3.0367 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 9 from 56 observations, assumed slope, autocmod 2.5c comet total magnitude slope K1 10.   n/a 9 autocmod 2.5c comet nuclear magnitude M2 14.4   0.6 9 from 40 observations, autocmod 2.5c comet nuclear magnitude slope K2 5.   n/a 9 autocmod 2.5c comet nuclear phase coefficient PC 0.03   n/a 9 autocmod 2.5c [ 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-Mar-07 09:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin