+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   52162 (4357 T-1) Classification: Main-belt Asteroid          SPK-ID: 2052162 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1237398311271316 3.7794e-08   a 3.152282472603377 1.7384e-08 au q 2.762219571778418 1.2205e-07 au i 2.09812019507923 3.8505e-06 deg node 126.8732619910664 0.00012933 deg peri 27.98068936095345 0.00013062 deg M 308.1397512810438 1.9088e-05 deg tp 2459294.988413405614 (2021-Mar-21.48841341) 0.00010934 TDB period 2044.259937906344 5.60 1.691e-05 4.63e-08 d yr n .1761028494099917 1.4567e-09 deg/d Q 3.542345373428335 1.9535e-08 au   Orbit Determination Parameters    # obs. used (total)      1329      data-arc span      18133 days (49.65 yr)      first obs. used      1971-03-24      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5331      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:32:47   Additional Information  Earth MOID = 1.77246 au   Jupiter MOID = 1.44625 au   T_jup = 3.194  [ 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 14.1   n/a MPO337675   diameter diameter 8.572 km 0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.073   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   52162 (4357 T-1)          Discovered 1971-Mar-26 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  4357 T-1 = 1999 GA25  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 08:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin