+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 89 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03983701226793544 1.2267e-08   a 3.134819489554144 9.8404e-09 au q 3.009937647091012 3.6296e-08 au i 10.79627352952014 8.933e-07 deg node 177.4522357315775 1.689e-06 deg peri 227.8359331318649 3.1046e-05 deg M 45.86881277262904 2.8541e-05 deg tp 2459138.195345047885 (2020-Oct-15.69534505) 0.00016113 TDB period 2027.296329724289 5.55 9.5458e-06 2.613e-08 d yr n .1775764079092274 8.3614e-10 deg/d Q 3.259701332017275 1.0232e-08 au   Orbit Determination Parameters    # obs. used (total)      3764      data-arc span      42050 days (115.13 yr)      first obs. used      1906-03-04      last obs. used      2021-04-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4117      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 11:18:11   Additional Information  Earth MOID = 2.02613 au   Jupiter MOID = 1.91458 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 9.11   n/a E2021B10   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-Aug-05 10:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin