+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1623 Vivian (1948 PL) Classification: Main-belt Asteroid          SPK-ID: 2001623 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1564058042281057 5.7625e-08   a 3.143535082706156 2.2497e-08 AU q 2.651867949976235 1.7442e-07 AU i 2.490177794393478 6.4049e-06 deg node 115.63458211 0.00015557 deg peri 316.6917964875245 0.00015751 deg M 149.4181772802729 2.2792e-05 deg tp 2455555.558137518217 (2010-Dec-25.05813752) 0.00012788 JED period 2035.75680034481 5.57 2.1854e-05 5.983e-08 d yr n .1768384121025774 1.8984e-09 deg/d Q 3.635202215436077 2.6016e-08 AU   Orbit Determination Parameters    # obs. used (total)      1321      data-arc span      23631 days (64.70 yr)      first obs. used      1948-08-09      last obs. used      2013-04-21      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .59035      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:46:04   Additional Information  Earth MOID = 1.66658 AU   T_jup = 3.189  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.0 mag n/a PDS3 (MPC 17262)   rotation period rot_per 20.5209 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Molnar, L.A.; Haegert, M.J.; Beaumonts, C.N.; Block, M.J.; et al. (2008) Minor Planet Bul. 35, 9-12.] 1623 Vivian (1948 PL)          Discovered 1948-Aug-09 by Johnson, E. L. at Johannesburg (UO) Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1948 PL = 1951 EG2 = 1954 SA = 1955 YC = 1960 WP = 1965 QB = 1965 UW = 1973 GG  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-23 14:12 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin