+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   973 Aralia (A922 FB) Classification: Outer Main-belt Asteroid          SPK-ID: 2000973 [ 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 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1120591111162806 3.169e-08   a 3.211219367503184 1.3364e-08 au q 2.851372979581393 1.0178e-07 au i 15.83015208547696 4.6806e-06 deg node 348.4386856027593 1.3473e-05 deg peri 87.73839010912346 2.7189e-05 deg M 97.99323663911368 2.1783e-05 deg tp 2458628.367010541940 (2019-May-24.86701054) 0.00012706 TDB period 2101.858079894163 5.75 1.3121e-05 3.592e-08 d yr n .1712770255250191 1.0692e-09 deg/d Q 3.571065755424975 1.4861e-08 au   Orbit Determination Parameters    # obs. used (total)      2864      data-arc span      36102 days (98.84 yr)      first obs. used      1922-03-18      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41315      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:51:24   Additional Information  Earth MOID = 1.92198 au   Jupiter MOID = 1.76154 au   T_jup = 3.122  [ 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 10.12   n/a E2021B10   diameter diameter 51.609 km 0.389 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.3662 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Stephens, R.D. (2002) Minor Planet Bull. 29, 47-48.] [Alkema, M.S. (2013) Minor Planet Bull. 40, 133-137.] [Oey, J.; Williams, H.; Groom, R. (2017) Minor Planet Bull. 44, 200-204.] geometric albedo albedo 0.098   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B Xk   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) 973 Aralia (A922 FB)          Discovered 1922-Mar-18 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A922 FB = 1954 SE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 08:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin