+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4461 Sayama (1990 EL) Classification: Main-belt Asteroid          SPK-ID: 2004461 [ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1309623134611957 3.1571e-08   a 2.851948021242913 1.2037e-08 au q 2.478450310509862 9.11e-08 au i 16.03013569390063 8.1372e-07 deg node 133.1703137514366 3.467e-06 deg peri 150.3752249379181 1.3041e-05 deg M 40.2877832761814 9.9251e-06 deg tp 2459003.629018174403 (2020-Jun-03.12901817) 4.8515e-05 TDB period 1759.182255607405 4.82 1.1138e-05 3.049e-08 d yr n .2046405361653107 1.2956e-09 deg/d Q 3.225445731975964 1.3614e-08 au   Orbit Determination Parameters    # obs. used (total)      2526      data-arc span      28778 days (78.79 yr)      first obs. used      1942-03-15      last obs. used      2020-12-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43251      source      ORB      producer      Otto Matic      solution date      2021-Mar-16 16:31:52   Additional Information  Earth MOID = 1.47204 au   Jupiter MOID = 2.0532 au   T_jup = 3.235  [ 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 11.48   n/a E2021B10   diameter diameter 17.233 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 40.73 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2010) Minor Planet Bull. 37, 161-165.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] [Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.136   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B X   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) 4461 Sayama (1990 EL)          Discovered 1990-Mar-05 by Sugie, A. at Dynic Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1990 EL = 1932 EJ = 1942 FA = 1943 OJ = 1975 BN = 1977 QC3 = 1980 EL = 1987 VP = 1988 VG7 = 1988 XC3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 17:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin