+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   4090 Risehvezd (1986 RH1) Classification: Main-belt Asteroid          SPK-ID: 2004090 [ 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 .208257824467892 5.3979e-08   a 2.360060548718621 1.3371e-08 AU q 1.868559473229982 1.2697e-07 AU i 1.328209358651248 6.1508e-06 deg node 266.5863626868346 0.00026062 deg peri 4.155259608370242 0.00026111 deg M 177.6343923853009 1.9688e-05 deg tp 2455747.057016974122 (2011-Jul-04.55701697) 6.9821e-05 JED period 1324.290137346072 3.63 1.1254e-05 3.081e-08 d yr n .2718437522471124 2.3101e-09 deg/d Q 2.85156162420726 1.6155e-08 AU   Orbit Determination Parameters    # obs. used (total)      1242      data-arc span      29965 days (82.04 yr)      first obs. used      1931-03-20      last obs. used      2013-04-03      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5582      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:01:29   Additional Information  Earth MOID = .852558 AU   T_jup = 3.522  [ 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 13.4 mag n/a PDS3 (MPC 28111)   4090 Rísehvezd           Discovered 1986 Sept. 2 by A. Mrkos at Klet. Named for Ríse hvezd (the Realm of Stars), Czech popular journal for astronomy. Originally published by the Czech Astronomical Society in Prague, the journal has described new findings from astronomy, astrophysics and space exploration and provided information about Czech and Slovak amateur and professional astronomy for more than three-quarters of a century. Name suggested by J. Ticha, M. Tichy and Z. Moravec. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19960828/MPCPages.arc Last Updated: 2003-09-26 Alternate Designations  1986 RH1 = 1931 FF = 1971 KB = 1982 KX = 1988 AR3 = 1989 GU  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 01:11 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin