+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   318 Magdalena (A891 SA) Classification: Main-belt Asteroid          SPK-ID: 2000318 [ 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 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08456555455476936 1.7749e-08   a 3.19431910721535 1.1036e-08 au q 2.924189740488788 5.5617e-08 au i 10.65683827244246 3.563e-07 deg node 161.4883549238911 1.958e-06 deg peri 295.9427503649948 7.8812e-06 deg M 75.48967931910714 8.8091e-06 deg tp 2458763.228718286117 (2019-Oct-06.72871829) 4.9901e-05 TDB period 2085.287192061947 5.71 1.0807e-05 2.959e-08 d yr n .172638090988335 8.9466e-10 deg/d Q 3.464448473941911 1.1969e-08 au   Orbit Determination Parameters    # obs. used (total)      3567      data-arc span      47297 days (129.49 yr)      first obs. used      1891-09-24      last obs. used      2021-03-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41405      source      ORB      producer      Otto Matic      solution date      2021-May-03 18:13:35   Additional Information  Earth MOID = 1.96041 au   Jupiter MOID = 1.68577 au   T_jup = 3.163  [ 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 9.46   n/a E2021B10   diameter diameter 85 km n/a J.G. Williams (E-mail September 1990) based on assumed albedo of 0.048 for C-type rotation period rot_per 42.65 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F.; Martinez, L. (2015) Minor Planet Bull. 42, 239.] [Pilcher, F. (2018) Posting on CALL web site: http://www.minorplanet.info/call.html] [Pilcher, F. (2019) Minor Planet Bull. 46, 130-131.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.054   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.685   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.81 deg. U-B UB 0.290   0.078 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.81 deg. Tholen spectral type spec_T CXF   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 318 Magdalena (A891 SA)          Discovered 1891-Sep-24 by Charlois, A. at Nice Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-08 17:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin