+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1121 Natascha (1928 RZ) Classification: Main-belt Asteroid          SPK-ID: 2001121 [ 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 .1569217397726468 4.4781e-08   a 2.547571719023249 1.3028e-08 AU q 2.147802332678529 1.1272e-07 AU i 6.16138023544512 8.3733e-06 deg node 357.9426310689718 5.6994e-05 deg peri 50.3572173101992 6.5907e-05 deg M 257.4079573421183 3.3105e-05 deg tp 2456823.752207256599 (2014-Jun-15.25220726) 0.00013761 JED period 1485.210652452777 4.07 1.1393e-05 3.119e-08 d yr n .2423898585735779 1.8593e-09 deg/d Q 2.94734110536797 1.5072e-08 AU   Orbit Determination Parameters    # obs. used (total)      1366      data-arc span      30358 days (83.12 yr)      first obs. used      1930-02-24      last obs. used      2013-04-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .55831      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:41:49   Additional Information  Earth MOID = 1.16264 AU   T_jup = 3.417  [ 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 11.8 mag n/a PDS3 (MPC 17261)   rotation period rot_per 13.197 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Moravec, P.; Letfullina, A.; Ditteon, R. (2013) Minor Planet Bul. 40, 17-20.] 1121 Natascha (1928 RZ)          Discovered 1928-Sep-11 by Shajn, P. at Simeis (094) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1928 RZ = A918 EK  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 13:22 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin