+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160331 (2003 QS57) Classification: Main-belt Asteroid          SPK-ID: 2160331 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1144925654394009 4.7155e-08   a 2.575553235805582 1.8578e-08 au q 2.280671538412451 1.1591e-07 au i 12.64607562453371 5.1243e-06 deg node 138.451857538641 2.4219e-05 deg peri 112.5084172667934 3.8013e-05 deg M 145.9099112049965 3.3531e-05 deg tp 2458588.591458011626 (2019-Apr-15.09145801) 0.00013699 TDB period 1509.747167252551 4.13 1.6336e-05 4.473e-08 d yr n .2384505219209192 2.5801e-09 deg/d Q 2.870434933198713 2.0706e-08 au   Orbit Determination Parameters    # obs. used (total)      543      data-arc span      8302 days (22.73 yr)      first obs. used      1998-04-23      last obs. used      2021-01-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56264      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:00:55   Additional Information  Earth MOID = 1.29814 au   Jupiter MOID = 2.28284 au   T_jup = 3.384  [ 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 15.6   n/a MPO248241   diameter diameter 2.183 km 0.505 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.234   0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   160331 (2003 QS57)          Discovered 2003-Aug-23 by LINEAR at Socorro Reference: 20070730/Numbers.arc Last Updated: 2007-08-06 [ show close-approach data ] Alternate Designations  2003 QS57 = 2006 EV44  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 18:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin