+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1501308710800028 1.4203e-08   a 2.399679494303169 7.1422e-09 au q 2.039413521510614 3.3395e-08 au i 5.330660110657423 5.8464e-07 deg node 256.1359321823942 3.9596e-06 deg peri 99.0372393666694 8.2296e-06 deg M 145.0262514561626 5.5877e-06 deg tp 2458653.518788951510 (2019-Jun-19.01878895) 2.0295e-05 TDB period 1357.776499084221 3.72 6.0618e-06 1.66e-08 d yr n .2651393658991807 1.1837e-09 deg/d Q 2.759945467095724 8.2145e-09 au   Orbit Determination Parameters    # obs. used (total)      2386      data-arc span      10006 days (27.39 yr)      first obs. used      1993-10-22      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .44059      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:09:13   Additional Information  Earth MOID = 1.04145 au   Jupiter MOID = 2.70116 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 13.86   n/a E2021B10   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 ] 2021-Apr-16 09:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin