+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109522 (2001 QU243) Classification: Main-belt Asteroid          SPK-ID: 2109522 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0813933515825272 4.1617e-08   a 2.974078839848641 1.9203e-08 au q 2.732008595202686 1.3093e-07 au i 10.31962884178837 5.2006e-06 deg node 347.3643377364124 2.2738e-05 deg peri 314.2456410002386 3.8296e-05 deg M 278.096659062677 3.23e-05 deg tp 2459426.712575181899 (2021-Jul-31.21257518) 0.00016949 TDB period 1873.38544813333 5.13 1.8144e-05 4.968e-08 d yr n .1921654725986633 1.8612e-09 deg/d Q 3.216149084494596 2.0766e-08 au   Orbit Determination Parameters    # obs. used (total)      949      data-arc span      21766 days (59.59 yr)      first obs. used      1960-09-24      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50185      source      ORB      producer      Otto Matic      solution date      2020-May-20 19:05:29   Additional Information  Earth MOID = 1.72904 au   Jupiter MOID = 2.08513 au   T_jup = 3.232  [ 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 14.2   n/a MPO432617   diameter diameter 5.492 km 0.540 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.134   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   109522 (2001 QU243)          Discovered 2001-Aug-24 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  2001 QU243 = 6282 P-L  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-27 13:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin