+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   910 Anneliese (A919 EC) Classification: Main-belt Asteroid          SPK-ID: 2000910 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1541192029943509 3.6116e-08   a 2.925611061743095 9.2053e-09 au q 2.474718216635793 1.0741e-07 au i 9.209038739399226 4.1164e-06 deg node 49.93600772378836 1.9219e-05 deg peri 208.473703146281 2.2231e-05 deg M 340.9903874189857 1.0895e-05 deg tp 2459097.014835804069 (2020-Sep-04.51483580) 5.5325e-05 TDB period 1827.777433200637 5.00 8.6265e-06 2.362e-08 d yr n .1969605234536684 9.2959e-10 deg/d Q 3.376503906850398 1.0624e-08 au   Orbit Determination Parameters    # obs. used (total)      3355      data-arc span      37105 days (101.59 yr)      first obs. used      1919-03-01      last obs. used      2020-10-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41773      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:24:30   Additional Information  Earth MOID = 1.46447 au   Jupiter MOID = 1.6909 au   T_jup = 3.241  [ 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 10.5   n/a MPO347521   diameter diameter 48.590 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 11.2863 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Alvarez, E.M. (2015) Minor Planet Bull. 42, 252-253.] [Oey, J.; Groom, R. (2018) Minor Planet Bull. 45, 363-366.] geometric albedo albedo 0.057   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B Ch   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) 910 Anneliese (A919 EC)          Discovered 1919-Mar-01 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A919 EC = 1946 SJ = 1975 AH = A924 BD  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-24 21:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin