+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1546193397650729 3.6104e-08   a 2.927285926661148 9.1399e-09 au q 2.474670909377212 1.0743e-07 au i 9.206418481187926 4.1152e-06 deg node 49.9231589066264 1.9226e-05 deg peri 208.4801763666786 2.2221e-05 deg M 20.36842550546015 1.0867e-05 deg tp 2459096.997437449328 (2020-Sep-04.49743745) 5.5211e-05 TDB period 1829.347217253168 5.01 8.5677e-06 2.346e-08 d yr n .1967915093453681 9.2167e-10 deg/d Q 3.379900943945084 1.0553e-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 = 1.4628 au   Jupiter MOID = 1.68665 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 10.54   n/a E2021B10   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-Mar-07 07:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin