+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15797 (1993 UD3) Classification: Main-belt Asteroid          SPK-ID: 2015797 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1500278770808442 3.471e-08   a 2.39966421789493 7.6538e-09 au q 2.039647689577289 8.1968e-08 au i 5.331079500301436 3.2333e-06 deg node 256.1413703084878 3.9407e-05 deg peri 99.01058762270401 4.0834e-05 deg M 92.03383316015596 1.0469e-05 deg tp 2458653.388381868264 (2019-Jun-18.88838187) 3.9201e-05 TDB period 1357.763533655837 3.72 6.496e-06 1.779e-08 d yr n .265141897743184 1.2685e-09 deg/d Q 2.759680746212571 8.8021e-09 au   Orbit Determination Parameters    # obs. used (total)      2118      data-arc span      9674 days (26.49 yr)      first obs. used      1993-10-22      last obs. used      2020-04-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43992      source      ORB      producer      Otto Matic      solution date      2020-May-20 04:15:41   Additional Information  Earth MOID = 1.04334 au   Jupiter MOID = 2.70097 au   T_jup = 3.505  [ 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 13.8   n/a MPO435846   diameter diameter 4.107 km 0.382 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.380   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15797 (1993 UD3)          Discovered 1993-Oct-22 by Hirasawa, M., Suzuki, S. at Nyukasa Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1993 UD3 = 1997 VT8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-28 01:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin