+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   507 Laodica (A903 DC) Classification: Main-belt Asteroid          SPK-ID: 2000507 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 84 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1006685741072003 3.8534e-08   a 3.154810022603824 1.425e-08 au q 2.837219796049193 1.2278e-07 au i 9.498372728936186 4.2051e-06 deg node 293.430192179715 2.7094e-05 deg peri 100.5042061751597 3.4846e-05 deg M 75.83188367003157 2.1498e-05 deg tp 2458569.370651372644 (2019-Mar-26.87065137) 0.00012231 TDB period 2046.719110673829 5.60 1.3867e-05 3.797e-08 d yr n .1758912584157576 1.1917e-09 deg/d Q 3.472400249158456 1.5684e-08 au   Orbit Determination Parameters    # obs. used (total)      2711      data-arc span      41697 days (114.16 yr)      first obs. used      1906-09-19      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41568      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:54:07   Additional Information  Earth MOID = 1.86402 au   Jupiter MOID = 1.95478 au   T_jup = 3.177  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.2   n/a MPO425802   diameter diameter 45.170 km 0.284 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 4.706 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Robinson, L. (2002) Minor Planet Bull. 29, 13.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] [Black, S.; Linville, D.; Michalik, D.; Wolf, M.; Ditteon, R. (2016) Minor Planet Bull. 43, 287-289.] [Mansego, E.A.; Rodriguez, P.B.; de Haro, J.L.; Chiner, O.R.; et al. (2016) Minor Planet Bull. 43, 332-336.] [Hess, K.; Bruner, M.; Ditteon, R. (2017) Minor Planet Bull. 44, 3-5.] [Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.198   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B X   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) 507 Laodica (A903 DC)          Discovered 1903-Feb-19 by Dugan, R. S. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A903 DC = 1953 GK1 = 1958 AK = 1974 YC = A896 YB = A912 VP  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-22 22:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin