+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 47 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1444362876867346 2.7314e-08   a 2.247438052387722 5.4213e-09 au q 1.922826443294935 6.0867e-08 au i 4.526302365756121 3.2803e-06 deg node 213.3187987553195 4.182e-05 deg peri 64.45044719032906 4.3739e-05 deg M 113.7934593987559 1.2433e-05 deg tp 2458611.504281460508 (2019-May-08.00428146) 4.2511e-05 TDB period 1230.637150976256 3.37 4.4529e-06 1.219e-08 d yr n .2925313929572291 1.0585e-09 deg/d Q 2.57204966148051 6.2044e-09 au   Orbit Determination Parameters    # obs. used (total)      2706      data-arc span      21151 days (57.91 yr)      first obs. used      1962-09-07      last obs. used      2020-08-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44443      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 23:01:55   Additional Information  Earth MOID = .911808 au   Jupiter MOID = 2.53818 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 12.8   n/a MPO502185   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. 2019-August); 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] 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 ] 2020-Sep-23 20:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin