+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3306 Byron (1979 SM11) Classification: Main-belt Asteroid          SPK-ID: 2003306 [ 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 50 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1442897533462284 2.7305e-08   a 2.247845987830564 5.3041e-09 au q 1.923504844686183 6.0825e-08 au i 4.525743035297877 3.1576e-06 deg node 213.3139982010791 4.088e-05 deg peri 64.50812874170511 4.26e-05 deg M 172.2344438426025 1.1937e-05 deg tp 2458611.567174773257 (2019-May-08.06717477) 4.0681e-05 TDB period 1230.972228036916 3.37 4.3569e-06 1.193e-08 d yr n .2924517643863562 1.0351e-09 deg/d Q 2.572187130974945 6.0694e-09 au   Orbit Determination Parameters    # obs. used (total)      2874      data-arc span      21318 days (58.37 yr)      first obs. used      1962-09-07      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43397      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:09:30   Additional Information  Earth MOID = .910648 au   Jupiter MOID = 2.53719 au   T_jup = 3.612  [ 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 12.87   n/a E2021B10   diameter diameter 7.610 km 1.859 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 7.321 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Moravec, P.; Letfullina, A.; Ditteon, R. (2013) Minor Planet Bull. 40, 17-20.] [Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Polakis, T. (2020) Minor Planet Bull. 47, 13-17.] geometric albedo albedo 0.282   0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   SMASSII spectral type spec_B S   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) 3306 Byron (1979 SM11)          Discovered 1979-Sep-24 by Chernykh, N. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1979 SM11 = 1951 GS = 1952 UJ1 = 1962 RL = 1969 US2 = 1971 FK = 1978 JJ = 1979 TJ2 = 1979 WS = 1982 OE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 08:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin