+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2899 Runrun Shaw (1964 TR2) Classification: Main-belt Asteroid          SPK-ID: 2002899 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1557502184839772 3.9074e-08   a 2.262370897793878 6.9901e-09 au q 1.91000613617069 8.7156e-08 au i 3.22100989407285 3.9141e-06 deg node 19.69448532221032 5.4981e-05 deg peri 304.0666049141821 5.6137e-05 deg M 166.5163042861967 1.2465e-05 deg tp 2458425.591939241106 (2018-Nov-03.09193924) 4.2236e-05 TDB period 1242.922744174538 3.40 5.7604e-06 1.577e-08 d yr n .2896398844475943 1.3424e-09 deg/d Q 2.614735659417066 8.0788e-09 au   Orbit Determination Parameters    # obs. used (total)      2318      data-arc span      23896 days (65.42 yr)      first obs. used      1954-11-23      last obs. used      2020-04-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46559      source      ORB      producer      Otto Matic      solution date      2020-May-20 01:46:57   Additional Information  Earth MOID = .900191 au   Jupiter MOID = 2.69309 au   T_jup = 3.601  [ 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 13.4   n/a MPO412188   diameter diameter 4.831 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.362   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   2899 Runrun Shaw (1964 TR2)          Discovered 1964-Oct-08 by Purple Mountain Observatory at Nanking Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1964 TR2 = 1981 SG1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-26 06:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin