+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15930 (1997 WT37) Classification: Main-belt Asteroid          SPK-ID: 2015930 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1127438219304108 3.7048e-08   a 2.39657304666279 7.6553e-09 au q 2.126374241846618 8.771e-08 au i 2.466347811701818 4.4191e-06 deg node 350.6548833859047 7.6375e-05 deg peri 338.7569148170065 7.8452e-05 deg M 106.5487700753211 1.7282e-05 deg tp 2458599.420584848994 (2019-Apr-25.92058485) 6.4965e-05 TDB period 1355.140836935907 3.71 6.4931e-06 1.778e-08 d yr n .2656550449870522 1.2729e-09 deg/d Q 2.666771851478961 8.5184e-09 au   Orbit Determination Parameters    # obs. used (total)      1873      data-arc span      25868 days (70.82 yr)      first obs. used      1949-11-25      last obs. used      2020-09-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49754      source      ORB      producer      Otto Matic      solution date      2020-Oct-22 16:42:02   Additional Information  Earth MOID = 1.11549 au   Jupiter MOID = 2.62878 au   T_jup = 3.519  [ 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 14.5   n/a MPO347650   diameter diameter 2.774 km 0.522 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.303   0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15930 (1997 WT37)          Discovered 1997-Nov-29 by LINEAR at Socorro Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1997 WT37 = 1993 TU21  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-27 08:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin