+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   589 Croatia (A906 EC) Classification: Main-belt Asteroid          SPK-ID: 2000589 [ 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 83 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03938710819713925 3.1477e-08   a 3.133300464753415 1.0893e-08 au q 3.009888820334025 1.0007e-07 au i 10.79731227864987 3.5374e-06 deg node 177.461666637283 1.9179e-05 deg peri 227.6344664518817 5.0213e-05 deg M 335.7102150583584 4.6362e-05 deg tp 2459137.185567555502 (2020-Oct-14.68556756) 0.00026082 TDB period 2025.822972010843 5.55 1.0564e-05 2.892e-08 d yr n .1777055571853161 9.2665e-10 deg/d Q 3.256712109172804 1.1322e-08 au   Orbit Determination Parameters    # obs. used (total)      3409      data-arc span      41896 days (114.70 yr)      first obs. used      1906-03-04      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42454      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:54:43   Additional Information  Earth MOID = 2.02658 au   Jupiter MOID = 1.91708 au   T_jup = 3.184  [ 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 9.1   n/a MPO502158   diameter diameter 93.617 km 1.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 24.821 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Mas, V.; Fornas, G.; Lozano, J.; Rodrigo, O.; et al. (2018) Minor Planet Bull. 45, 76-82.] geometric albedo albedo 0.041   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.730   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.22, mean=5.38, max.=5.53) deg. U-B UB 0.368   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.22, mean=5.38, max.=5.53) deg. Tholen spectral type spec_T CX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 589 Croatia (A906 EC)          Discovered 1906-Mar-03 by Kopff, A. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A906 EC = 1936 WM = 1947 RA = 1953 RF1 = 1953 VR1 = 1953 VU = A912 HH  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 08:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin