+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   34833 (2001 SF239) Classification: Main-belt Asteroid          SPK-ID: 2034833 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2170403301526724 3.9074e-08   a 2.210482788102059 7.3795e-09 au q 1.730718873975588 8.7915e-08 au i 3.831703410542247 3.405e-06 deg node 106.571304392258 6.3287e-05 deg peri 227.492213156571 6.369e-05 deg M 273.7352345816132 9.4222e-06 deg tp 2459288.147151858256 (2021-Mar-14.64715186) 3.2279e-05 TDB period 1200.408697186352 3.29 6.0111e-06 1.646e-08 d yr n .2998978604901871 1.5018e-09 deg/d Q 2.69024670222853 8.9811e-09 au   Orbit Determination Parameters    # obs. used (total)      951      data-arc span      10499 days (28.74 yr)      first obs. used      1991-09-14      last obs. used      2020-06-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60125      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 20:26:03   Additional Information  Earth MOID = .723312 au   Jupiter MOID = 2.68111 au   T_jup = 3.624  [ 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 15.7   n/a MPO417050   diameter diameter 2.009 km 0.493 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.332   0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   34833 (2001 SF239)          Discovered 2001-Sep-19 by LINEAR at Socorro Reference: 20020128/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  2001 SF239 = 1991 RL22 = 1998 XD27  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-11 02:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin