+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   193902 (2001 QJ242) Classification: Main-belt Asteroid          SPK-ID: 2193902 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2422814848914181 5.14e-08   a 2.354249823562315 6.6918e-09 au q 1.783858680504278 1.2204e-07 au i 5.349574345934131 5.9251e-06 deg node 171.0934250823936 4.2279e-05 deg peri 209.9753704867387 4.3818e-05 deg M 106.5365482102974 9.1939e-06 deg tp 2458810.042861283095 (2019-Nov-22.54286128) 3.326e-05 TDB period 1319.402329993074 3.61 5.6255e-06 1.54e-08 d yr n .2728508142030412 1.1633e-09 deg/d Q 2.924640966620352 8.3131e-09 au   Orbit Determination Parameters    # obs. used (total)      467      data-arc span      7092 days (19.42 yr)      first obs. used      2001-07-24      last obs. used      2020-12-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52205      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 12:09:42   Additional Information  Earth MOID = .787272 au   Jupiter MOID = 2.53786 au   T_jup = 3.510  [ 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 16.5   n/a MPO494073   diameter diameter 3.152 km 1.271 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.054   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   193902 (2001 QJ242)          Discovered 2001-Aug-24 by LINEAR at Socorro Reference: 20081113/Numbers.arc Last Updated: 2008-11-17 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2111-Jul-14 09:31 00:04 Juno 0.0466069965934929 0.0466025487531409 0.0466114465318796 3.2489798432843 3.24897976294134 2492280.896585319 4.06897180430014 549.673844961086 45.2367242448085 66.667491374008 141403.273561174 T 13 CATAB v2.0f-lin.ifort 2021-Feb-24 12:09:44 2021-Feb-24 12:09 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-09 05:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin