+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3899 Wichterle (1982 SN1) Classification: Main-belt Asteroid          SPK-ID: 2003899 [ 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 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1766943766505469 3.909e-08   a 3.188084963546765 1.6324e-08 au q 2.624768278203887 1.2424e-07 au i 2.818854032940387 3.9589e-06 deg node 82.03156049591817 7.592e-05 deg peri 325.938820988924 7.6651e-05 deg M 200.1196442940231 1.3209e-05 deg tp 2459923.891478556149 (2022-Dec-10.39147856) 8.1056e-05 TDB period 2079.185593579378 5.69 1.5969e-05 4.372e-08 d yr n .1731447164272862 1.3298e-09 deg/d Q 3.751401648889642 1.9208e-08 au   Orbit Determination Parameters    # obs. used (total)      2758      data-arc span      26269 days (71.92 yr)      first obs. used      1948-10-10      last obs. used      2020-09-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4387      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:56:11   Additional Information  Earth MOID = 1.63547 au   Jupiter MOID = 1.63813 au   T_jup = 3.171  [ 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 11.56   n/a E2021B10   diameter diameter 21.174 km 0.367 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 5.8572 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Owings, L.E. (2013) Minor Planet Bull. 40, 8-10.] [Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] geometric albedo albedo 0.094   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   3899 Wichterle (1982 SN1)          Discovered 1982-Sep-17 by Mahrova, M. at Klet Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1982 SN1 = 1948 TF2 = 1949 YG = 1949 YW = 1951 GL1 = 1953 RX = 1954 YN = 1965 SQ = 1976 SZ = 1984 CB = 1985 FQ = 1987 OF1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 20:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin