+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 88 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0396200394221736 1.2289e-08   a 3.134046063192395 9.8378e-09 au q 3.009875034617804 3.6345e-08 au i 10.79652104274938 8.9352e-07 deg node 177.458333461379 1.6891e-06 deg peri 227.6896850813989 3.1197e-05 deg M 11.20034668058964 2.8747e-05 deg tp 2459137.449947214405 (2020-Oct-14.94994721) 0.00016192 TDB period 2026.546110590512 5.55 9.542e-06 2.612e-08 d yr n .1776421459737228 8.3643e-10 deg/d Q 3.258217091766985 1.0228e-08 au   Orbit Determination Parameters    # obs. used (total)      3709      data-arc span      42022 days (115.05 yr)      first obs. used      1906-03-04      last obs. used      2021-03-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41185      source      ORB      producer      Otto Matic      solution date      2021-May-03 18:37:56   Additional Information  Earth MOID = 2.02543 au   Jupiter MOID = 1.91582 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-May-13 15:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin