+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   46568 Stevenlee (1991 SL) Classification: Inner Main-belt Asteroid          SPK-ID: 2046568 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09915326136191585 4.6036e-08   a 1.963066078923898 5.9495e-09 au q 1.768421674929645 8.7956e-08 au i 19.13675049624675 3.8485e-06 deg node 12.87140623192282 9.8315e-06 deg peri 25.06416620151874 2.0683e-05 deg M 114.2823067349124 1.6755e-05 deg tp 2458681.583270359297 (2019-Jul-17.08327036) 4.6866e-05 TDB period 1004.617652117968 2.75 4.5671e-06 1.25e-08 d yr n .3583452861305356 1.6291e-09 deg/d Q 2.157710482918151 6.5394e-09 au   Orbit Determination Parameters    # obs. used (total)      1703      data-arc span      13897 days (38.05 yr)      first obs. used      1982-05-25      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45494      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 23:46:38   Additional Information  Earth MOID = .78086 au   Jupiter MOID = 3.16007 au   T_jup = 3.805  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8   n/a MPO412496   diameter diameter 2.111 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.628   0.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   46568 Stevenlee           Discovered 1991 Sept. 30 by R. H. McNaught at Siding Spring Observatory. Steven (Steve) Lee (b. 1956) has been a night assistant at the Anglo-Australian Telescope for the past two decades. He is also an active amateur astronomer and telescope maker, writing technical articles on these topics and encouraging interest in the amateur community. He visually discovered comet C/1999 H1 (Lee). NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040504/MPCPages.arc Last Updated: 2004-05-11 Alternate Designations  1991 SL = 2000 XU13  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 04:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin