+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   P/2010 A2 (LINEAR) Classification: Encke-type Comet          SPK-ID: 1003055 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2455224.5 (2010-Jan-28.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1244145159164767 7.8399e-06   a 2.290482023060616 4.0191e-05 AU q 2.005512810946137 2.4467e-05 AU i 5.254739288701907 0.00016893 deg node 320.2882145259454 0.00089524 deg peri 133.1901927232392 0.016757 deg M 15.46063021400696 0.013184 deg tp 2455170.123224549533 (2009-Dec-04.62322455) 0.046309 JED period 1266.16049224391 3.47 0.033326 9.124e-05 d yr n .2843241454817486 7.4835e-06 deg/d Q 2.575451235175094 4.5191e-05 AU   Orbit Determination Parameters    # obs. used (total)      128      data-arc span      112 days      first obs. used      2009-12-10      last obs. used      2010-04-01      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      4      fit RMS      1.1359      data source      ORB      producer      Otto Matic      solution date      2011-Sep-14 21:23:31   Additional Information  Earth MOID = 1.02625 AU   T_jup = 3.583  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 15.5 mag 0.8 20 from 26 observations, assumed slope, autocmod 2.5a comet total magnitude slope K1 10.   n/a 20 autocmod 2.5a Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2009.9   P/2010 A2        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2013-May-21 12:25 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin