+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   C/2011 U3 (PANSTARRS) Classification: Hyperbolic Comet          SPK-ID: 1003156 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455872.5 (2011-Nov-07.0) TDB Reference: JPL 6 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 1.000513026840093 7.7258e-05   a -2088.876303231221 314.06 AU q 1.071649609191908 0.00026945 AU i 116.7805493891098 0.0056158 deg node 228.3788883780853 5.0812e-05 deg peri 287.8144583261267 0.011881 deg M 359.9978330408684 0.00048876 deg tp 2456082.401591534969 (2012-Jun-03.90159154) 0.0072629 JED period n/a n/a n/a n/a d yr n 1.032369081007262E-5 2.3282e-06 deg/d Q n/a n/a AU   Orbit Determination Parameters    # obs. used (total)      60      data-arc span      94 days      first obs. used      2011-10-24      last obs. used      2012-01-26      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      fit RMS      .6102      data source      ORB      producer      Otto Matic      solution date      2012-Jan-27 19:50:31   Additional Information  Earth MOID = .469295 AU   T_jup = -0.572  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 12.1 mag 0.6 6 2 parameter fit from 48 observations, autocmod 2.5b comet total magnitude slope K1 14.   n/a 6 autocmod 2.5b [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2013-May-23 07:39 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin