+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   171588 Naprstek (1999 WG1) Classification: Main-belt Asteroid          SPK-ID: 2171588 [ 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 .201502128344436 3.3382e-07   a 2.466893636401588 5.5769e-08 AU q 1.969809318267323 7.8564e-07 AU i 2.426061308704664 1.1165e-05 deg node 15.1964640495993 0.00021942 deg peri 3.113177992035418 0.00022464 deg M 184.1353577709689 9.1656e-05 deg tp 2457091.853388837964 (2015-Mar-10.35338884) 0.00038287 JED period 1415.22034689348 3.87 4.7991e-05 1.314e-07 d yr n .254377348933845 8.6261e-09 deg/d Q 2.963977954535853 6.7007e-08 AU   Orbit Determination Parameters    # obs. used (total)      283      data-arc span      7894 days (21.61 yr)      first obs. used      1991-09-08      last obs. used      2013-04-19      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .50948      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 20:17:37   Additional Information  Earth MOID = .97116 AU   T_jup = 3.457  [ 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 16.4 mag n/a MPC12202   171588 Náprstek           Discovered 1999 Nov. 26 by J. Ticha and M. Tichy at Klet. Vojta Náprstek (1826-1894) was a Czech philanthropist and advocate of progressive ideas. In 1865, after living in Wisconsin for a decade, he founded the American Club of Bohemian Women in Prague, offering lectures on various topics. He also co-founded the Czech Tourist Club in 1888. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20120703/MPCPages.arc Last Updated: 2012-07-09 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 05:34 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin