+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3197 Weissman (1981 AD) Classification: Main-belt Asteroid          SPK-ID: 2003197 [ 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 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .181184419952767 3.4756e-08   a 2.665965800104382 1.2137e-08 au q 2.182934332998555 9.3172e-08 au i 16.41077460263516 4.6323e-06 deg node 111.6415537579172 1.343e-05 deg peri 313.4233777286316 1.8772e-05 deg M 50.95564624609916 1.2713e-05 deg tp 2458775.454620455467 (2019-Oct-18.95462046) 5.6057e-05 TDB period 1589.938360211339 4.35 1.0857e-05 2.972e-08 d yr n .2264238721507089 1.5462e-09 deg/d Q 3.148997267210209 1.4336e-08 au   Orbit Determination Parameters    # obs. used (total)      2479      data-arc span      23981 days (65.66 yr)      first obs. used      1955-03-22      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38475      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:10:50   Additional Information  Earth MOID = 1.22862 au   Jupiter MOID = 2.18607 au   T_jup = 3.302  [ 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 11.6   n/a MPO358659   diameter diameter 18.984 km 0.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 6.112 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Bohn, L.; Hibbler, B.; Stein, G.; Ditteon, R. (2015) Minor Planet Bull. 42, 89-90.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.132   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B Cgh   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) 3197 Weissman (1981 AD)          Discovered 1981-Jan-01 by Bowell, E. at Flagstaff (AM) Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1981 AD = 1971 UO3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-25 08:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin