+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   12131 Echternach (2085 P-L) Classification: Main-belt Asteroid          SPK-ID: 2012131 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ 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 .02226172598311156 7.4561e-08   a 2.905663685263006 2.2095e-08 AU q 2.840978596502603 2.1451e-07 AU i .9983406538845035 6.9686e-06 deg node 278.2413080542116 0.00043862 deg peri 196.672868070203 0.00048227 deg M 119.9742680823718 0.00020349 deg tp 2455797.590601813278 (2011-Aug-24.09060181) 0.0010228 JED period 1809.116128120069 4.95 2.0635e-05 5.65e-08 d yr n .1989922008898851 2.2698e-09 deg/d Q 2.970348774023409 2.2587e-08 AU   Orbit Determination Parameters    # obs. used (total)      783      data-arc span      19198 days (52.56 yr)      first obs. used      1960-09-24      last obs. used      2013-04-17      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5701      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:47:20   Additional Information  Earth MOID = 1.8568 AU   T_jup = 3.285  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.3 mag n/a PDS3 (MPC 36310)   12131 Echternach           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld at Leiden on Palomar Schmidt plates taken by T. Gehrels. As assistant editor of the Dutch astronomical magazine Zenit, Dutch science writer Eddy Echternach (b. 1961) has been popularizing astronomy since the late 1980s. He is co-author of numerous books on astronomy and astronomical exercises for use in primary and high schools. The name was suggested by C. E. Koppeschaar. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070926/MPCPages.arc Last Updated: 2007-09-30 Alternate Designations  2085 P-L = 1998 KX62  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 05:11 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin