+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   226944 (2004 TZ344) Classification: Main-belt Asteroid          SPK-ID: 2226944 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1183114681266641 4.3472e-08   a 2.810811806371691 2.0642e-08 au q 2.478260534932095 1.2278e-07 au i 12.91912999344353 4.8793e-06 deg node 53.21976327862814 2.4254e-05 deg peri 63.46551351051228 3.6371e-05 deg M 54.29070712977582 2.5001e-05 deg tp 2458740.921285114986 (2019-Sep-14.42128512) 0.00011913 TDB period 1721.25843075183 4.71 1.8961e-05 5.191e-08 d yr n .2091493023756783 2.3039e-09 deg/d Q 3.143363077811287 2.3084e-08 au   Orbit Determination Parameters    # obs. used (total)      615      data-arc span      7052 days (19.31 yr)      first obs. used      2001-01-06      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51466      source      ORB      producer      Otto Matic      solution date      2020-May-21 10:31:41   Additional Information  Earth MOID = 1.52522 au   Jupiter MOID = 2.09956 au   T_jup = 3.274  [ 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 15.2   n/a MPO418211   diameter diameter 4.280 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.096   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   226944 (2004 TZ344)          Discovered 2004-Oct-15 by Spacewatch at Kitt Peak Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-04 12:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin