+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3364 Zdenka (1984 GF) Classification: Main-belt Asteroid          SPK-ID: 2003364 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1043983351071722 3.1608e-08   a 2.198679791114433 5.6784e-09 au q 1.969141281488301 7.1137e-08 au i 5.549437446797483 2.7671e-06 deg node 145.984559949841 3.6023e-05 deg peri 108.6655718834417 3.955e-05 deg M 343.1579025863857 1.5148e-05 deg tp 2459056.210246241485 (2020-Jul-25.71024624) 5.0048e-05 TDB period 1190.807068407192 3.26 4.6132e-06 1.263e-08 d yr n .3023159750651559 1.1712e-09 deg/d Q 2.428218300740566 6.2713e-09 au   Orbit Determination Parameters    # obs. used (total)      2584      data-arc span      30190 days (82.66 yr)      first obs. used      1938-02-06      last obs. used      2020-10-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45706      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:00:57   Additional Information  Earth MOID = .96276 au   Jupiter MOID = 2.61016 au   T_jup = 3.653  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.5   n/a MPO502185   diameter diameter 5.399 km 0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.584 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Higgins, D. (2008) Minor Planet Bull. 35, 30-32.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] geometric albedo albedo 0.183   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 3364 Zdenka (1984 GF)          Discovered 1984-Apr-05 by Mrkos, A. at Klet Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1984 GF = 1938 CE = 1952 QU = 1978 OF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-30 18:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin