+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1228 Scabiosa (1931 TU) Classification: Main-belt Asteroid          SPK-ID: 2001228 [ 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 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04173594598721652 3.2763e-08   a 2.768924157691795 9.1026e-09 au q 2.653360488603671 9.2497e-08 au i 3.280504109015369 3.5445e-06 deg node 307.9032428321587 5.9512e-05 deg peri 208.720877329157 7.3309e-05 deg M 299.8311312500085 4.3349e-05 deg tp 2459281.777091663702 (2021-Mar-08.27709166) 0.00020291 TDB period 1682.925989844987 4.61 8.2987e-06 2.272e-08 d yr n .2139131501755221 1.0548e-09 deg/d Q 2.884487826779918 9.4825e-09 au   Orbit Determination Parameters    # obs. used (total)      3388      data-arc span      32550 days (89.12 yr)      first obs. used      1931-10-05      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41233      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:59:17   Additional Information  Earth MOID = 1.66319 au   Jupiter MOID = 2.10115 au   T_jup = 3.335  [ 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 11.5   n/a MPO452176   diameter diameter 14.685 km 1.704 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.249   0.262 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   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) 1228 Scabiosa (1931 TU)          Discovered 1931-Oct-05 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1931 TU = 1949 QO = 1949 QU1 = 1954 QP = 1954 TF = 1978 XL1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 06:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin