+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   506 Marion (A903 DB) Classification: Main-belt Asteroid          SPK-ID: 2000506 [ 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 90 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1473000693827223 1.6934e-08   a 3.038588652625515 1.119e-08 au q 2.591004333268224 4.854e-08 au i 17.00628435803337 7.8139e-07 deg node 312.9347201441313 4.9427e-06 deg peri 145.7928497908523 7.4418e-06 deg M 116.0379777089767 9.6275e-06 deg tp 2458576.903103716786 (2019-Apr-03.40310372) 4.9485e-05 TDB period 1934.66731404946 5.30 1.0687e-05 2.926e-08 d yr n .1860785042398233 1.0279e-09 deg/d Q 3.486172971982806 1.2838e-08 au   Orbit Determination Parameters    # obs. used (total)      2784      data-arc span      41805 days (114.46 yr)      first obs. used      1906-09-17      last obs. used      2021-03-02      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39008      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 10:59:36   Additional Information  Earth MOID = 1.62402 au   Jupiter MOID = 1.67718 au   T_jup = 3.158  [ 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 8.89   n/a E2021B10 IRAS observations used: 17 diameter diameter 105.94 km 2.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17 rotation period rot_per 13.546 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] [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.] [Warner, B.D. (2010) Minor Planet Bull. 37, 127-130.] [Saylor, D.A.; Leake, M. (2012) J. Southeastern Assoc. for Research in Astron. 5, 25-28.] [Wang, X.; Muinonen, K.; Wang, Y. (2015) Planet. Space Sci. 118, 242-249.] geometric albedo albedo 0.0454   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17 B-V BV 0.718   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=14.62, mean=15.90, max.=18.33) deg. U-B UB 0.332   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=14.62, mean=15.90, max.=18.33) deg. Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices 506 Marion (A903 DB)          Discovered 1903-Feb-17 by Dugan, R. S. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A903 DB = 1948 PF1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 01:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin